Initial D1SC plan
Thread Starter
Joined: Dec 2004
Posts: 1,294
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From: Dallas (Richardson), TX, USA
Initial D1SC plan Hey all,
I'm trying to justify buying a D1SC kit before tax return time comes. Specifically, I want to try to get the blower on the car without buying a new set of heads. Here's my situation:
I had to rebuild my engine at one point a couple years ago. I decided to get Mahle -9cc dished pistons and forged Compstar rods. To keep my CR up while I was N/A, I milled the heads .040" and put .040" gaskets on there. The end result was something like 10.28:1 CR assuming a 61cc CC after milling. I never had the heads CC tested, so that's just a guess based on how much I milled.
The cam in the car is a TR 230/236 on a 112 LSA. It's a pretty hefty cam for a blower, as I understand it, but I've seen similar setups do quite well. I'm planning on keeping this cam at first.
The question I have is how much boost I could run on this setup if I were to drop the CR down closer to 9.9:1 with stock head gaskets and the cam, what kind of boost could I run? Ultimately, I'd like to see 625+RWHP with heads, lower CR, etc, but if I can do 575+RWHP now without buying heads, I'm going to pull the trigger!
I'm trying to justify buying a D1SC kit before tax return time comes. Specifically, I want to try to get the blower on the car without buying a new set of heads. Here's my situation:
I had to rebuild my engine at one point a couple years ago. I decided to get Mahle -9cc dished pistons and forged Compstar rods. To keep my CR up while I was N/A, I milled the heads .040" and put .040" gaskets on there. The end result was something like 10.28:1 CR assuming a 61cc CC after milling. I never had the heads CC tested, so that's just a guess based on how much I milled.
The cam in the car is a TR 230/236 on a 112 LSA. It's a pretty hefty cam for a blower, as I understand it, but I've seen similar setups do quite well. I'm planning on keeping this cam at first.
The question I have is how much boost I could run on this setup if I were to drop the CR down closer to 9.9:1 with stock head gaskets and the cam, what kind of boost could I run? Ultimately, I'd like to see 625+RWHP with heads, lower CR, etc, but if I can do 575+RWHP now without buying heads, I'm going to pull the trigger!
Thread Starter
Joined: Dec 2004
Posts: 1,294
Likes: 0
From: Dallas (Richardson), TX, USA
Actually, I just read that the stock MLS headgaskets are .060". I was using .054" in my math. If that's the case, then I could get it down to 9.8:1.
So, does everyone agree that 12psi would be safe on pump gas with a FMIC on that setup, and that 575+RWHP would be an easily attainable goal with stock heads?
Thanks, for the response, No Juice. (I'm really hoping Bob will chime in, too!)
So, does everyone agree that 12psi would be safe on pump gas with a FMIC on that setup, and that 575+RWHP would be an easily attainable goal with stock heads?
Thanks, for the response, No Juice. (I'm really hoping Bob will chime in, too!)
Actually, I just read that the stock MLS headgaskets are .060". I was using .054" in my math. If that's the case, then I could get it down to 9.8:1.
So, does everyone agree that 12psi would be safe on pump gas with a FMIC on that setup, and that 575+RWHP would be an easily attainable goal with stock heads?
Thanks, for the response, No Juice. (I'm really hoping Bob will chime in, too!)
So, does everyone agree that 12psi would be safe on pump gas with a FMIC on that setup, and that 575+RWHP would be an easily attainable goal with stock heads?
Thanks, for the response, No Juice. (I'm really hoping Bob will chime in, too!)
Check this GTO out that made 532 rwhp with 8 psi of boost and headers and exhaust. http://www.exoticperformanceplus.com...Car.php?car=46 Bob
Thread Starter
Joined: Dec 2004
Posts: 1,294
Likes: 0
From: Dallas (Richardson), TX, USA
Thanks for the reply, Bob. I'll be on the phone again with you eventually to iron out the details. I just have to grow a pair and drop the cash, lol. 
