Twin Turbo Project LS1

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Apr 14, 2008 | 10:12 PM

fattony

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Twin Turbo Project LS1

So I finished my ls1 and I have around 400hp and 380tq its in my RX7... well I feel like it is slow. I want more power (I keep compairing it to my bike) but I got to thinking and I can do all of the frabracation myself. I plan on doing this on a stock block with heads to lower the compression a bit. Here are my Q's

1)I work at Nissan so I can get 2 GT28R's for $1200 brand new, will these turbo's be able to run on the ls1 or do I need bigger turbos? my goal is 550-650hp stock block, nothing too crazy and I want to run low boost. What kind of power can I expect with these turbos?

2)What kind of injectors will I need to run I currently have svo 30# I know people running like 60# but I have no clue when it comes to injectors size and with turbo I know they need more gas flow then NA so what kind of injectors will I need to run?

3)I seen the intercooler on a trans am that had a twin inlet from each side and the outlet on top righ into the throttle body where can I find this intercooler and any1 know how much it is?

4)I have a walboro 255 fuel pump will I need to get a twin walboro fule pump or the aeromotive fuel pump to support it?

5)to lower the compression can I just bolt on the caddy heads 317's (not sure) to lower the compression but will I have to modify anythin to make these heads work

I have been and will continue to search these are my only questions that I cant come up with a solid answer.

Thanks
Tony

Apr 14, 2008 | 10:23 PM

Sideways240sx

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From: Byron, IL

gt28's are to small. maybe 2 57 mm turbos... you need bigger then 30's. I would probably suggest 60's.
I believe that ic was custom made, but im sure you could get a core, and have someone weld it up.

Single walbro should be fine to 500-550 whp. Much more you will need another. If you want to lower the compression some the 6.0 truck heads are a great option, thats not to expensive.

Good luck, Chris

Apr 14, 2008 | 11:47 PM

Banshee Ben

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yea the 28 are to small.

Apr 15, 2008 | 08:47 AM

fattony

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really here is a twin turbo kit
http://www.ls1.com.au/forum/showthread.php?t=53767
its on a gto and it roughly the same size as a gt28r I thought.

the turbo it uses is the KKR 330 where I thought the GT28R is the same difference?

Last edited by fattony; Apr 15, 2008 at 08:53 AM.

Apr 15, 2008 | 08:51 AM

y2khawk

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Incon kits were 28R's. They could make 700RW, but the turbos were maxed.

Apr 15, 2008 | 09:08 AM

fattony

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http://www.highperformancepontiac.co...awk/index.html

I just found this I curious what this car is making?

also I would be looking for 600 at most any more power and it is iceing on the cake