Gotcha, modern cars being 2000 up??

http://dagostinoracing.com/index.php...oducts_id=2175

Ben,
Call the guys up at cometic and see which head gasket would work for you. Their thickest gasket is .074 which would drop your compression ratio by almost .5. They are $89 each. Felpro makes some thicker head gaskets too. I did this on my old mustang. It was a 96 with 2001 heads and I need to drop the compression a bit due to the procharger.

The other options is to have some material removed from the bowl. Talk to Ron. They recommended speedomotiv for some port work I was interested in.

Other options are to get it tuned again by someone else. This will only help if the original tuner was bad.

Cheaper band aids:
I would try running colder plugs and see if Adam will let you borrow his wide band to make sure that there aren't any other issues causing you problems.

No like 94 and up. My 96 Mustang had it with OBD II.

:iagree:

Dropped my CR 4/10ths with a .61 Fel Pro MLS. They are also reusable, I'm on my second use.

While you're at it install some 1.7 or 1.8 (whatever you LS guys use) rockers to compensate for the hp loss.

I honestly think he will make more power. one of two thing is going on here:

1) his compression is much higher than 11:1

or

2) There is another problem that hasn't been diagnosed

If it's number one than the reduction in compression will allow him to get more aggressive with the timing. This will make up for the loss.

Ben do you have a OBD scanner? You could keep if in your car and see if it throws any codes when it starts detonating. What have you done so far to eliminate the common culprits?

I agree. Ben, I think you should take the car to CMS and have Ryne re-tune it.

Thanks for all the tips guys.

Damian,
I do run Torco and with it it's totally fine. I could crank up the timing.

Adam,
Stock rocker ratio is 1.7. I pass smog just fine, but my cam, while mild, is about as big as I can go before running into trouble. Changing rockers effectively changes duration right? I am afraid changing rocker ratio may cause a sniffer problem.:huh:

Carlos,
I've definitely thought about the cometic. My suspicion is that CR is indeed substantially higher than the advertised 11:1, hence the reason I can't run any timing at all. Of course with a lil Torco, I could keep that higher CR and crank up the timing and it should make more than if I dropped the CR and turned up the timing right?

Thanks for all the tips guys.

Damian,
I do run Torco and with it it's totally fine. I could crank up the timing.

Adam,
Stock rocker ratio is 1.7. I pass smog just fine, but my cam, while mild, is about as big as I can go before running into trouble. Changing rockers effectively changes duration right? I am afraid changing rocker ratio may cause a sniffer problem.:huh:

Carlos,
I've definitely thought about the cometic. My suspicion is that CR is indeed substantially higher than the advertised 11:1, hence the reason I can't run any timing at all. Of course with a lil Torco, I could keep that higher CR and crank up the timing and it should make more than if I dropped the CR and turned up the timing right?


I run Torco to make the ping problem never appear. I run 1 quart per 15 gal of 91, which is supposedly the equivalent of 93. I believe it because I mixed Toluene before that and it came out to the same result for the same output 93. Of course I have no idea how much timing I could put back in before the problem would reappear. If I'm at 18 total (my recollection) could I get to 30-34 with the mix I run? I don't know. I'm willing to run 1 quart per tank, but not more.

Benihana, you think too much. Thicker HG = lower comp = 91 only. :thumbs_up:

1.8 rockers = more lift = vroom vroom. Duration is changed minimally. I can do the math if you give me the specs, I think. You can also have them run it without any paper work just to see if it will pass before you take it in for reals.