turbo A4 question and head gasket question
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turbo A4 question and head gasket question ok first, are there any turbo A4s out there with after market torque converters? What are your track times. I already know Rob's time.
and as for head gaskets, so has anyone yet noticed that simply putting thicker head gaskets in the motor results in poor protection from detonation as far as lowered cr is concerned? Low compression pistons are much better <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> .
<small>[ September 09, 2002, 02:00 AM: Message edited by: AlienDroid ]</small>
and as for head gaskets, so has anyone yet noticed that simply putting thicker head gaskets in the motor results in poor protection from detonation as far as lowered cr is concerned? Low compression pistons are much better <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> .
<small>[ September 09, 2002, 02:00 AM: Message edited by: AlienDroid ]</small>
Re: turbo A4 question and head gasket question Ive heard that the lt1 guys do this all the time with good sucess.
Mello yellow has done this to his NA motor, which he plans to convert to FI later. He reports no knock.
Mello yellow has done this to his NA motor, which he plans to convert to FI later. He reports no knock.
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Re: turbo A4 question and head gasket question Yeah but IMHO the best way to avoid heat spots in the cylinder is to create more clearance by adding a piston with a dish-like thing dipping downward the center. Otherwise with the head gasket you only make the clearance area taller and you still have bad combustion chamber design as far as FI is concerned. I'm not trying to throw out the head gasket idea. I'm just saying every point of cr you drop a portion of it will be wasted by the effects of bad combustion chamber shape. The NA pistons are designed to work perfectly for an NA aplication but what's good for NA is often bad for boost.
My opinion is that thicker head gaskets should only be a temporary fix, while one waits for some custom low compression dish shaped pistons with ring lands designed specific for boost.
I just don't think anyone with FI is going to get anywhere on the stock pistons for very long.
<small>[ September 09, 2002, 11:17 AM: Message edited by: AlienDroid ]</small>
My opinion is that thicker head gaskets should only be a temporary fix, while one waits for some custom low compression dish shaped pistons with ring lands designed specific for boost.
I just don't think anyone with FI is going to get anywhere on the stock pistons for very long.
<small>[ September 09, 2002, 11:17 AM: Message edited by: AlienDroid ]</small>
Re: turbo A4 question and head gasket question Well yes lower CR pistons are the best way to drop the CR, But you asked if the thicker head gaskets worked, as some LT1 guys and Mello yellow have tried, they can be a good temporary fix.
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From: Barto PA
Re: turbo A4 question and head gasket question well i have a auto and a yank 3400 stall. Ran 11.8s on street tires. Was way way rich too. this was at 7psi and my mph was 120. On the street last nite I leaned it out and it ran alot alot better. I thin I might top 125 now <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> .
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Re: turbo A4 question and head gasket question </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Cool28:
<strong>well i have a auto and a yank 3400 stall. Ran 11.8s on street tires. Was way way rich too. this was at 7psi and my mph was 120. On the street last nite I leaned it out and it ran alot alot better. I thin I might top 125 now <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> .</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">cheers.
What do you think you would run if you had traction as far as time goes?
I see what you are saying smokinHawk, I'm just concerned because lowering the compression ratio creates bad side effects, like lower hp per pound of boost and bad gas milage. So if I'm going to have the bad, I best damn well have the most good possible. <img border="0" alt="[judgement]" title="" src="graemlins/gr_judge.gif" />
<strong>well i have a auto and a yank 3400 stall. Ran 11.8s on street tires. Was way way rich too. this was at 7psi and my mph was 120. On the street last nite I leaned it out and it ran alot alot better. I thin I might top 125 now <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> .</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">cheers.
What do you think you would run if you had traction as far as time goes?
I see what you are saying smokinHawk, I'm just concerned because lowering the compression ratio creates bad side effects, like lower hp per pound of boost and bad gas milage. So if I'm going to have the bad, I best damn well have the most good possible. <img border="0" alt="[judgement]" title="" src="graemlins/gr_judge.gif" />
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From: Barto PA
Re: turbo A4 question and head gasket question well I had traction but I didnt leave off boost. I pulled a 1.85 on street tires. I ran 11.6s before tuning. SO I really dont know I should pull. I did go 11.8s with no spin. Yet again it was really really rich. My dumbass mad it richer yet and lost 2mph the last run of the night. I still think its still rich but I dont want to move it anymore till I get a wideband on it.
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Re: turbo A4 question and head gasket question A trans brake would really make it haul, I think you should be able to cut high 1.5x 60' times with that trap speed if you used everything you got. <img border="0" alt="[fight]" title="" src="graemlins/gr_punch.gif" />
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