D1 with 11:1 comp LS1???
Thread Starter
Intermediate
Joined: Aug 2009
Posts: 38
Likes: 0
From: Modesto CA
D1 with 11:1 comp LS1???
I have a 97 LS1 vette with afr 205's 11:1 comp and mild GT2 cam. I was thinking about buying a D1 run meth with about 7psi. Its the stock bottem end with almost 130,00 miles on it. I wanted to see if it would be safe to run like that? Any help is appreciated...
Burning Brakes
Joined: Nov 2006
Posts: 768
Likes: 25
From: Cape Cod
I have a 97 LS1 vette with afr 205's 11:1 comp and mild GT2 cam. I was thinking about buying a D1 run meth with about 7psi. Its the stock bottem end with almost 130,00 miles on it. I wanted to see if it would be safe to run like that? Any help is appreciated...
it will work for a couple of miles...too much comp too many miles
Melting Slicks
Joined: Feb 2006
Posts: 2,163
Likes: 5
From: Houston
Le Mans Master
Joined: Mar 2005
Posts: 5,811
Likes: 31
From: Minnetonka MN
St. Jude Donor '06
i think you could get by with 5-6 # boost... prolly not for long tho since its a stock bottom end.
i have a forged 427 with 11.9:1 CR... i am planning on boost this winter, 10psi and e-85. i have been told it should be ok...
i have a forged 427 with 11.9:1 CR... i am planning on boost this winter, 10psi and e-85. i have been told it should be ok...
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Race Director
Joined: Mar 2001
Posts: 10,030
Likes: 10
From: Prescott AZ
St. Jude Donor '04
I have a 97 LS1 vette with afr 205's 11:1 comp and mild GT2 cam. I was thinking about buying a D1 run meth with about 7psi. Its the stock bottem end with almost 130,00 miles on it. I wanted to see if it would be safe to run like that? Any help is appreciated...
Thread Starter
Intermediate
Joined: Aug 2009
Posts: 38
Likes: 0
From: Modesto CA
Thats what I wanted to do but, the cost of labor to switch the heads out would be a lot and I dont have enough mech. skills to do it myself. Im torn...
Race Director
Joined: Mar 2001
Posts: 10,030
Likes: 10
From: Prescott AZ
St. Jude Donor '04
The AFR"s are worth about $1000.00 to $1200.00 sell them and pick up the 317's for about $250.00 then buy headstuds,gaskets and have some money left over for labor. You might also needs BAP.
Thread Starter
Intermediate
Joined: Aug 2009
Posts: 38
Likes: 0
From: Modesto CA
Yeah that sounds pretty good I think I might do that then I can drive my car to work not having to worry If I need to call a towtruck lol wouldnt be funny if it happened though.
Former Vendor
Joined: Dec 2006
Posts: 2,239
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http://www.exoticperformanceplus.com...Car.php?car=39
Take a look at the above link. The customer had us build the engine for N/A, the next year he ended up wanting to add an APS twin turbo system. Turbo's typically require a lower compression ratio than a centrifical supercharger. We didn't go crazy with the boost, but it worked out very well. Bob
Take a look at the above link. The customer had us build the engine for N/A, the next year he ended up wanting to add an APS twin turbo system. Turbo's typically require a lower compression ratio than a centrifical supercharger. We didn't go crazy with the boost, but it worked out very well. Bob
Burning Brakes
Joined: Nov 2006
Posts: 768
Likes: 25
From: Cape Cod
Not sure if its worth all the headaches
Melting Slicks
Joined: Feb 2006
Posts: 2,163
Likes: 5
From: Houston
It's been done many times.
Race Director
Joined: Apr 2009
Posts: 10,581
Likes: 252
From: SE TEX
I can be done The tune will probably determine how long it'll last. 5-7lbs can be safe but I wouldn't let the tuner add meth for power, just safety That way if the meth does not fire you'll still be ok, but when it is spraying it should be very safe. That being said as far as longevity its really a crapshoot. Guys run stockers and boost to over 650 here (not the norm, but it happens) with no problems. Mine had problems and I was only at 507 
Good luck!
The tune will probably determine how long it'll last. 5-7lbs can be safe but I wouldn't let the tuner add meth for power, just safety That way if the meth does not fire you'll still be ok, but when it is spraying it should be very safe. That being said as far as longevity its really a crapshoot. Guys run stockers and boost to over 650 here (not the norm, but it happens) with no problems. Mine had problems and I was only at 507 Good luck!
Thread Starter
Intermediate
Joined: Aug 2009
Posts: 38
Likes: 0
From: Modesto CA
http://www.exoticperformanceplus.com...Car.php?car=39
Take a look at the above link. The customer had us build the engine for N/A, the next year he ended up wanting to add an APS twin turbo system. Turbo's typically require a lower compression ratio than a centrifical supercharger. We didn't go crazy with the boost, but it worked out very well. Bob
Take a look at the above link. The customer had us build the engine for N/A, the next year he ended up wanting to add an APS twin turbo system. Turbo's typically require a lower compression ratio than a centrifical supercharger. We didn't go crazy with the boost, but it worked out very well. Bob