More power!!!!

[blackax]

Ok so I'm going to have my motor rebuilt, and i think this is the best time to add some more power. But i dont have a ton of money to add it. So what do you guys think is the best best, im trying to keep it under 6500$

Right now
Stock Ls2
Magnacharger supercharger (mp112)
should be good for 450 rwhp

Option 1
Forge Ls2
Cam
Magnacharger supercharger (mp112)
should be good for 475 rwhp
5000$ ish

Options 2
Forge ls2
stroker 402
Cam
naturally aspirated
Should be good for 450 rwhp
5000$ ish

Option 3
Forge ls2
stroker 402
Cam
Custom fit a MP122 or a TVS 1900
should be good for 530 rwhp
not sure on the cost


What do you guys Think

[SeanPlunk]

Ok so I'm going to have my motor rebuilt, and i think this is the best time to add some more power. But i dont have a ton of money to add it. So what do you guys think is the best best, im trying to keep it under 6500$

Right now
Stock Ls2
Magnacharger supercharger (mp112)
should be good for 450 rwhp

Option 1
Forge Ls2
Cam
Magnacharger supercharger (mp112)
should be good for 475 rwhp
5000$ ish

Options 2
Forge ls2
stroker 402
Cam
naturally aspirated
Should be good for 450 rwhp
5000$ ish

Option 3
Forge ls2
stroker 402
Cam
Custom fit a MP122 or a TVS 1900
should be good for 530 rwhp
not sure on the cost


What do you guys Think

Is the blower currently on the car an 112? If so, I'd probably go option 3 but keep the compression down. That way you could keep the M112 for now and have about 475ish rwhp, but down the line throw something like a TVS2300 on and make closer to 600whp.

[BADDASSC6]

Forge cranks can be really expensive for a decent one. They are not necessary unless your going really big 800+. I would get forged rods and pistons and re-use the stock crank. Use ARP bolts for the rods and if you have extra money the head bolts too. Later when you have more money upgrade the supercharger. The eaton blowers will not overpower the stock crank so you will have room to grow. I think you may be a little conservative on your hp estimates.

My I have a few friends from digital corvettes in AZ with eaton/TVS

LS1 W/1900 ~485 rwhp
LS2 W/1900 ~550 rwhp

[blackax]

Forge cranks can be really expensive for a decent one. They are not necessary unless your going really big 800+. I would get forged rods and pistons and re-use the stock crank. Use ARP bolts for the rods and if you have extra money the head bolts too. Later when you have more money upgrade the supercharger. The eaton blowers will not overpower the stock crank so you will have room to grow. I think you may be a little conservative on your hp estimates.

My I have a few friends from digital corvettes in AZ with eaton/TVS

LS1 W/1900 ~485 rwhp
LS2 W/1900 ~550 rwhp

I'm not sure yet if i have any damage on my crank, so i'm planing for the worst case ( i could fix the problem for less then 1000$) but thats still stock crap :barf:


I got a quote for 6200$ for:

*Callies forged crank
*Forged rod's
*Diamond pistons
*Comp lifters
*Custom cam
*Head Studs
*Seals and other odd's and ends

(thanks sean for the CMS Info)

This setup will be rock solid for the power that I would be makeing. But I would like to make a bit more , between 500 and 550 at the wheels


If I go the 402 route i'll be blower limtied but i would still make a ton of power, and i'll make even more when i upgrade to a bigger blower. But all that is costly.

I could always forge it then add a 50 shot and call it a day :drool2:

[blackax]

@BADDASSC6 its always better to under estimate then over estimate so you always feel better about the power you make

[SeanPlunk]

What blower is currently on the car?

[blackax]

What blower is currently on the car?

Right now it has a MP112 (a 1.8L roots supercharger)

[SeanPlunk]

Right now it has a MP112 (a 1.8L roots supercharger)

I have an eaton M112 on the Cobra too. If I were on a budget I'd build a low compression 402, but send the m112 here for porting (http://www.posiperformance.com/). The Cobra guys are making some great power with Posi ported blowers. The top dog Race port makes 50-70rwhp more than my car with the same mods.

[blackax]

I have an eaton M112 on the Cobra too. If I were on a budget I'd build a low compression 402, but send the m112 here for porting (http://www.posiperformance.com/). The Cobra guys are making some great power with Posi ported blowers. The top dog Race port makes 50-70rwhp more than my car with the same mods.

Wow, his prices are not too bad. I'm thinking I will go with a stock CI motor with a stock compression, but forge the rod's and pistons, and port the supercharger, add a cam and redo the valve train so i get a little more out of her and she will be able to take it.

[blackax]

@SeanPlunk what size TB do you guys run?

[jsup]

Forge cranks can be really expensive for a decent one. They are not necessary unless your going really big 800+. I would get forged rods and pistons and re-use the stock crank. Use ARP bolts for the rods and if you have extra money the head bolts too. Later when you have more money upgrade the supercharger. The eaton blowers will not overpower the stock crank so you will have room to grow. I think you may be a little conservative on your hp estimates.

My I have a few friends from digital corvettes in AZ with eaton/TVS

LS1 W/1900 ~485 rwhp
LS2 W/1900 ~550 rwhp

good advice.

[SeanPlunk]

Wow, his prices are not too bad. I'm thinking I will go with a stock CI motor with a stock compression, but forge the rod's and pistons, and port the supercharger, add a cam and redo the valve train so i get a little more out of her and she will be able to take it.

I would definitely drop the compression. I believe an LS2 is about 10.6 to 1 and that's not too blower friendly. You will want more power in the future, trust me. Having the lower compression will allow you to step up to a TVS2300 or add in more boost later once you get bored.

Not sure on the TB, I'll find out what the stocker flows.

[SeanPlunk]

FWIW, I think if you did a stock CI low compression blower motor with a ported blower you could easily make 550+ wheel depending on your fuel system.

[blackax]

FWIW, I think if you did a stock CI low compression blower motor with a ported blower you could easily make 550+ wheel depending on your fuel system.

hummm....That seems a little high for a low compression, an ls2 stock is 10.9:1 so if i split the difference and run 10 so i have room to grow but still not giveing up to much power at the current time

[BADDASSC6]

The best advice I think I can give is to figure out exactly what you want to do with the car. Drag, Road race, TT, killer street machine, show (Gay) car. Be as clear as you can be with CMS and then listen to there advice. It's easy to find guys to tell you to drop the dollars and go big, but if you aren't racing then what's the difference between 550-650-750?

As far as compression goes. I would stick with the stock compression unless you are planning on running an excess of 12 psig. Honestly 12 psig came straight from my ass, but that is where my gut separates big and little boost (for v8s).

[blackax]

The best advice I think I can give is to figure out exactly what you want to do with the car. Drag, Road race, TT, killer street machine, show (Gay) car. Be as clear as you can be with CMS and then listen to there advice. It's easy to find guys to tell you to drop the dollars and go big, but if you aren't racing then what's the difference between 550-650-750?

As far as compression goes. I would stick with the stock compression unless you are planning on running an excess of 12 psig. Honestly 12 psig came straight from my ass, but that is where my gut separates big and little boost (for v8s).

I was thinking the same thing. My motor can take 8psi all day long and forging it will only make it stronger. I want to have it a street car, that I race about once a month, Auto cross and road racing. I only want the number to keep me happy. :sm_laughing: 500 rwhp is the number i want so i'll see how close i can get.

[BADDASSC6]

How much power were you making before? I was 460 rwhp with HCI. You can definitely get there.

[SeanPlunk]

I'm telling you, lower compression - boost is addicting. I'd go somewhere lke 9 to 1 and crank the boost up. That MP112 (especially with porting) will easily handle 15psi. 500+whp should be easy.

[blackax]

How much power were you making before? I was 460 rwhp with HCI. You can definitely get there.

I'm not sure, my car took a crap the weekend before i was gonna get it on a dyno. Most people where getting 430-440 ish so im guessing somewhere around there

[blackax]

I'm telling you, lower compression - boost is addicting. I'd go somewhere lke 9 to 1 and crank the boost up. That MP112 (especially with porting) will easily handle 15psi. 500+whp should be easy.

15 Pounds is alot for that blower. I have 6 liter motor so the most you can get even with overdriving it and a 2.7 inch pulley is 12 pounds

[SeanPlunk]

Everyone may disagree with me, but I don't see the point of forging the motor and retaining stock compression. The car has a blower on it. In the long run if the car is going to stay blown, lower compression is the way to go. You won't lose too much power by dropping the compression to 9 to 1 and it gives you room to grow and a higher margin of safety. I'm telling you, eventually you'll want a TVS or something else on there :)

If you want to build a N/A setup I would put some badass heads on the car with a cam and forged rods and pistons and be done with it.

[heypal]

stroke it and keep it blown ftw call cms tell ryne what you want out of the car and whats in the price range. he is cool as shit. Hell i'll probably be going to his shop this week coming around.

[blackax]

Everyone may disagree with me, but I don't see the point of forging the motor and retaining stock compression. The car has a blower on it. In the long run if the car is going to stay blown, lower compression is the way to go. You won't lose too much power by dropping the compression to 9 to 1 and it gives you room to grow and a higher margin of safety. I'm telling you, eventually you'll want a TVS or something else on there :)

If you want to build a N/A setup I would put some badass heads on the car with a cam and forged rods and pistons and be done with it.

So i looked up how much power is lost with a low compression motor, its like 5% :p Thats nothing I thought it was gonna be much higher then that. So it will be something that I keep in mind when I get her all fixed up

[BADDASSC6]

So i looked up how much power is lost with a low compression motor, its like 5% :p Thats nothing I thought it was gonna be much higher then that. So it will be something that I keep in mind when I get her all fixed up

Remember thats 5% across the whole rev range. That is a significant amount of area under the curve. Let the guys at the shop tell you if you need to drop the compression or not.

[enkeivette]

It's always easier to get more power with boost. Bigger blower. Get all forged parts, you never know what you'll want to do in two years.

[SeanPlunk]

It's always easier to get more power with boost. Bigger blower. Get all forged parts, you never know what you'll want to do in two years.

Exactly :D

Forged, 9 to 1 LS2 with a ported M112 at 12lbs or so = :drool2:

[BADDASSC6]

It's always easier to get more power with boost. Bigger blower. Get all forged parts, you never know what you'll want to do in two years.

True!

[blackax]

This is the quote i got from RPM, Everyone else seems to be very busy (they couldn't get my car in for almost a month)


Forged Pistons
Forged "H" beam rods
LS2 crank - chamfered & micro-polished
King main, rod,cam bearings

Decked



Honed
Line-Honed
Balanced
Assembled

Installation and tuning are available - $1975
The above installation price includes removal of the original engine -
removal, inspection, cleaning and transfer of parts and reinstallation of
the engine with dyno tuning.

Not included in the above but needed
1) Fluids - oil/antifreeze, etc.
2) Head Gaskets
3) Front Cover Seal and Gasket
4) Rear Cover gasket & seal

Total = $4964.87

The cam, pushrods, springs and retainers would be an additional $795.




5700 doesnt seem to bad

[SeanPlunk]

It's going to be a beast, very cool.

[BADDASSC6]

I so called it in post #3. Dude This is going to rock. Are you changing the pulley? What was the final compression ratio that you guys decided on?

[heypal]

If you want I can hit up Ryne for you at cms...up to you.

[heypal]

ps charlie is good people too.

[blackax]

If you want I can hit up Ryne for you at cms...up to you.

Ryne's main mechanic is going out of town for a month...And i dont want to wait any longer lol :D

[blackax]

I so called it in post #3. Dude This is going to rock. Are you changing the pulley? What was the final compression ratio that you guys decided on?

We are gonna go 10.9:1 (stock) When i get the cam spec's i'll post them up, but i want something kind of nasty. I'm just going down to a 2.7 (i have a 2.9 right now) its good for 1-2 psi but I'm also going to get my supercharger ported so she will flow better.

[blackax]

So I finally drooped the V off at rpm today. Charlie has a cool shop. He said they have more info about her by weeks end

[blackax]

Well i just got off the phone with RPM after taking my motor apart it seems that 2 of my lifters broke and destroyed my cam. They are honeing it right now and should have it back together by next week. I'm hoping I can get it back the 26th or so

[SeanPlunk]

Awesome :)

[Sonic03SVT]

I know somewhere in here was asked about the size TB on an 03/04 cobra...Stock TB is a twin 57mm and flows roughly 1100 cfm from what i was able to gather back in the day :huh:

[SeanPlunk]

Progress? Is the V back up and running? Dyno numbers?

[blackax]

The motor is back in the car and it has about 500 break in miles on it. They are putting it on the dyno today and i'm gonna pick it up friday. They ran in to a few small things but its all looking good.

[SeanPlunk]

Awesome! Post numbers when you get them.

[SeanPlunk]

Numbers?

[blackax]

I dont have the final numbers but they where seeing about 450 - 460 when they where doing the tune. I'll find out tomorrow when i pick her up :-P

[SeanPlunk]

I dont have the final numbers but they where seeing about 450 - 460 when they where doing the tune. I'll find out tomorrow when i pick her up :-P

Congrats - great numbers!

[SoCalC55]

Agreed, nice numbers

Doing us 4 door Sedans proud :)

[blackax]

Well I was a little off on the numbers. I'm makeing 470 wrhp @ 6550 rpm and 440 tqr at 4500 rpm. All this at only 5.5 psi ( I have a boost leak in the blower) ill post up the sheet when I get a chance

[SeanPlunk]

Well I was a little off on the numbers. I'm makeing 470 wrhp @ 6550 rpm and 440 tqr at 4500 rpm. All this at only 5.5 psi ( I have a boost leak in the blower) ill post up the sheet when I get a chance

Great numbers. You have a boost leak in the blower? Does it need to be rebuilt?

[blackax]

Great numbers. You have a boost leak in the blower? Does it need to be rebuilt?

Yes it does. I'm gonna hold off till I get a few miles on her. She is wicked quick now and the blower is supper loud :D

[blackax]

I don't have access to a scanner at my house but here is a pic of the dyno sheet


http://lh3.ggpht.com/_1YDVUg9BjuM/TEubDVxe07I/AAAAAAAACh0/Gy1xJxrIN6A/s1500/IMG_20100724_143630.jpg

[blackax]

Here is the scanned dyno sheet

http://lh6.ggpht.com/_1YDVUg9BjuM/TE3QSLOgjQI/AAAAAAAACh8/aV6xwOXWN-A/s800/DOC100726.png