Look what I just bought for my 347 stroker

[joedls]

This is going in my 68 GT/CS.

What I bought (http://www.racingjunk.com/Superchargers/2398012/weiand-174-supercharger-small-block-ford.html)

[94cobra69ss396]

Sweet. Isn't that what you had on it before with the old 302? How much compression does your 347 have? Are you going to have to drop the compression?

[Vettezuki]

Cool! Makes me excited for what the Snake will be like someday.

[joedls]

Sweet. Isn't that what you had on it before with the old 302? How much compression does your 347 have? Are you going to have to drop the compression?

I had it on the 302 that is going in RX-Snake, then I had it put it on my 347 stroker. It's 9.7:1 compression. Here's a video when the engine was on an engine dyno.

http://i119.photobucket.com/albums/o151/joedls/th_1377.jpg (http://s119.photobucket.com/albums/o151/joedls/?action=view&current=1377.mp4)

It made over 550 HP on that engine dyno with 8 PSI of boost. Later I increased the boost to 12 PSI and ran water methanol injection.

[94cobra69ss396]

That's a lot of compression for a roots. Are you going to run the meth injection again or just keep the boost low?

[blackax]

That's a lot of compression for a roots. Are you going to run the meth injection again or just keep the boost low?

My ls2 runs at 10.5:1 with no meth injection

[joedls]

That's a lot of compression for a roots. Are you going to run the meth injection again or just keep the boost low?

I'll probably lower the compression to ~9:1. If not I'll start off with low boost. Haven't made up my mind yet. I was going to re-build the 347 with high compression and a big cam, but I decided to just replace the blower. I loved the way that engine ran. Very streetable and pulled like a freight train.

[joedls]

My ls2 runs at 10.5:1 with no meth injection

How much boost?

[94cobra69ss396]

My ls2 runs at 10.5:1 with no meth injection

You have a much more efficient engine and a heat exchanger and I thought your engine only had 9:1.

[blackax]

How much boost?

I'm at 5.5 pounds, I should be good up to 9 before i really need to look meth/ water

[94cobra69ss396]

I'm at 5.5 pounds, I should be good up to 9 before i really need to look meth/ water

What year is your car?

[blackax]

You have a much more efficient engine and a heat exchanger and I thought your engine only had 9:1.

True ls2 heads do flow really well. A stock ls2 run at 10.9:1 so I didn't drop that much. But i'm fully forged on the bottom end, with a very sorted blower cam (ls9)

[blackax]

What year is your car?

2006 cts-v

[94cobra69ss396]

2006 cts-v

I thought you had a 2009 that came with the blower. What blower are you running because that also makes a difference. The one Joe is getting is an old school 2 lobe roots. It's not as efficient as the TVS blowers.

[blackax]

I thought you had a 2009 that came with the blower. What blower are you running because that also makes a difference. The one Joe is getting is an old school 2 lobe roots. It's not as efficient as the TVS blowers.

I have a MP112 (three lobe roots) its the same blower on a 2003'ish croba.

[joedls]

I have a MP112 (three lobe roots) its the same blower on a 2003'ish croba.

Does your blower have an intercooler?

[blackax]

Does your blower have an intercooler?

Yes, On a hot day fully warmed up I get between 120 - 145 intake temps. (i think its been almost a year the last time I checked.)

[joedls]

Yes, On a hot day fully warmed up I get between 120 - 145 intake temps. (i think its been almost a year the last time I checked.)

You're able to run higher compression because it's intercooled, it's a more efficient blower, and you're running low boost.

[Vettezuki]

Yes, On a hot day fully warmed up I get between 120 - 145 intake temps. (i think its been almost a year the last time I checked.)

I forget what Ron's intake temps are, but they're insane, something well over 200 I think. If there's a guy who could really benefit from an intercooler, it's him.

[blackax]

You're able to run higher compression because it's intercooled, it's a more efficient blower, and you're running low boost.

Your not going to intercool it?

[94cobra69ss396]

I forget what Ron's intake temps are, but they're insane, something well over 200 I think. If there's a guy who could really benefit from an intercooler, it's him.

Steve said mine reach 280+ degrees.

[joedls]

Your not going to intercool it?

Nope.

[enkeivette]

Hells yeah.

[enkeivette]

You're able to run higher compression because it's intercooled, it's a more efficient blower, and you're running low boost.


Ya, exactly, it's an entirely different animal. I think for an old style roots setup you need like 8:1 compression to get up to around 8 or 10 lbs of boost.

With an old style roots and 10.5:1 you'd be better off not running it. You'd start to melt pistons with a few lbs because of the heat.

Newer LS motors with liquid cooled roots blowers have better flow, better control over the engine, and the blowers run cooler. I think a lot of those Magnacharger guys run pretty decent boost with stock LS compression. Different animal.

[enkeivette]

Steve said mine reach 280+ degrees.

Holy shit balls. Whatever I guess, if you can tune it to work, keep it up.

[blackax]

Ya, exactly, it's an entirely different animal. I think for an old style roots setup you need like 8:1 compression to get up to around 8 or 10 lbs of boost.

With an old style roots and 10.5:1 you'd be better off not running it. You'd start to melt pistons with a few lbs because of the heat.

Newer LS motors with liquid cooled roots blowers have better flow, better control over the engine, and the blowers run cooler. I think a lot of those Magnacharger guys run pretty decent boost with stock LS compression. Different animal.

Ya if your not gonna intercool it then you have to lower the compression.

[joedls]

Ya if your not gonna intercool it then you have to lower the compression.

I don't need to lower the compression. I may end up lowering it, but I ran it with the current compression on 12 PSI with water methanol injection.

[joedls]

http://i119.photobucket.com/albums/o151/joedls/IMG_20111216_133526.jpg

[94cobra69ss396]

http://i119.photobucket.com/albums/o151/joedls/IMG_20111216_133526.jpg

Merry early Christmas! So when is it getting installed?

[joedls]

Merry early Christmas! So when is it getting installed?

Not sure. It'll be awhile. I should have all the mertal work on the car done next month. Just getting everything I need so I can put it together when it's done. I have to find a good painter. The guy I used for my 65 convertible is no longer painting cars.

[joedls]

I sent Comp Cams some info on my car and they gave me a recommendation for Comp Cams part #35-775-8 with 236/248 duration @.050, 579 lift, and 114 LSA. Any thoughts on their recommendation? I'll be running a 2800 stall converter with 4.11 gears and 28" tires. The car should weigh ~3500 lbs with me in it.

[joedls]

Not sure. It'll be awhile. I should have all the mertal work on the car done next month. Just getting everything I need so I can put it together when it's done. I have to find a good painter. The guy I used for my 65 convertible is no longer painting cars.

Here are some pics I took last night.

http://i119.photobucket.com/albums/o151/joedls/P1020880.jpg

http://i119.photobucket.com/albums/o151/joedls/P1020879.jpg

http://i119.photobucket.com/albums/o151/joedls/P1020882.jpg

http://i119.photobucket.com/albums/o151/joedls/P1020881.jpg

And here's a couple of pics of the crash.

http://i119.photobucket.com/albums/o151/joedls/October14-Pa140317.jpg

http://i119.photobucket.com/albums/o151/joedls/October14-Pa140313.jpg

http://i119.photobucket.com/albums/o151/joedls/October14-Pa140315.jpg

[Shaolin Crane]

I sent Comp Cams some info on my car and they gave me a recommendation for Comp Cams part #35-775-8 with 236/248 duration @.050, 579 lift, and 114 LSA. Any thoughts on their recommendation? I'll be running a 2800 stall converter with 4.11 gears and 28" tires. The car should weigh ~3500 lbs with me in it.

Thats alot of duration for a roots engine. Thats more then what my n/a engine is, its 232/242 but with a 111*. I'd think for a non smog car with a roots you'd want a touch less duration. Then again i only have minimal knowledge of blower cams.

FWIW my Blower engine has a 218/218 114* and .562/.562. This is a centri blower/smog setup though so im not sure how it compares.

[joedls]

Thats alot of duration for a roots engine. Thats more then what my n/a engine is, its 232/242 but with a 111*. I'd think for a non smog car with a roots you'd want a touch less duration. Then again i only have minimal knowledge of blower cams.

FWIW my Blower engine has a 218/218 114* and .562/.562. This is a centri blower/smog setup though so im not sure how it compares.

The cam that's in it now has 222/232, .510/.534, and 114 LSA. Maybe I'll just stick to what I have.

[Shaolin Crane]

Thats exactly what i was thinking when you mentioned a cam, i dont see an issue running the same duration with my lift, maybe toss a 1.7 rocker on your current cam and reap the best of both worlds.

[joedls]

Thats exactly what i was thinking when you mentioned a cam, i dont see an issue running the same duration with my lift, maybe toss a 1.7 rocker on your current cam and reap the best of both worlds.

So how does more duration affect a blown engine? From my understanding, I want to stay away from cams with a lot of overlap, so it doesn't bleed off boost. Wouldn't more duration just help?

[Shaolin Crane]

More duration usually means more overlap, like i said i'm not up on my blower cam knowledge. But if im understanding it right, less duration and overlap makes for a more throttle responsive car, have you though about a custom grind? FTI only charges $50 over an off the shelf cam that will run circles around it generally.

[joedls]

More duration usually means more overlap, like i said i'm not up on my blower cam knowledge. But if im understanding it right, less duration and overlap makes for a more throttle responsive car, have you though about a custom grind? FTI only charges $50 over an off the shelf cam that will run circles around it generally.

I always thought overlap was measured by the LSA, the less separation, the more overlap. The recommended cam from Comp has 114* LSA, so not much overlap.

My understanding is that more duration means you will sacrifice some low end torque, but it will have more top-end power. Given the nature of the roots blower and its instant torque, I don't think this is a real issue. But again, I'm no expert.

I wouldn't mind paying an extra $50 for a cam. I just don't know enough to determine what specs the custom grind should be.

[Shaolin Crane]

Ed would take care of that (fti) he usually wont give you final specs until its payed for, nature of the beast. Or for $75 i can hook you up with my cam grinder and he can regrind your cam to most any specs and he'll be able to hook you up with better knowledge.

[Shaolin Crane]

Also, are you running a stock block?

[joedls]

Also, are you running a stock block?

Stock block with a main stud girdle and a valley girdle.

[Shaolin Crane]

Ohhhhhh, yeah, the girdles really dont do much. What were you making before with the 302?

[joedls]

Ohhhhhh, yeah, the girdles really dont do much. What were you making before with the 302?

It was this same 347. The engine made 556 HP on the engine dyno @ 8 PSI. Then I increased the boost to 12 PSI and added water/methanol injection. Never dynoed it after that, so I couldn't tell you how much power it made.

[Shaolin Crane]

Hmmm, i'd leave the cam you have now just for safety of the block. You're well into flower pot block range

[joedls]

Hmmm, i'd leave the cam you have now just for safety of the block. You're well into flower pot block range

No big deal. If it splits, I'll just get a Sportsman block.

[Shaolin Crane]

Haha, if thats the case get a sportsman block now. Did you call Erik about the whipple?

[joedls]

Haha, if thats the case get a sportsman block now. Did you call Erik about the whipple?

Not yet. I came to my senses and decided to wait until after Christmas before I spend any more money on cars. I just spent over $5K in the last month.

[Shaolin Crane]

Ive had months like that. Then it finally hits you that you pissed away that much money that fast

[joedls]

Ive had months like that. Then it finally hits you that you pissed away that much money that fast

Yeah, and in the next month I have birthdays for my wife, my son, both my parents, and my father-in-law.

[Shaolin Crane]

The worst i ever did was drop nearly 10k in one month. Hit me like a hollowpoint after the month was over lol

[joedls]

The worst i ever did was drop nearly 10k in one month. Hit me like a hollowpoint after the month was over lol

Yeah, but I'm just a poor working man. If I had your money I'd burn mine.

[Shaolin Crane]

Shit this when i USE to have money. Part time at the dojo i was making nearly 1k a week. So i was pretty much burning it. That didnt last unfortunately. No i'm poor, wish i had some of that money back :(