I'm building a stock short block turbo engine for my 92 foxbody. I'd like to stay with twin turbos for the boost response on the street,(95% street/5% strip). I will be taking the rotating assembly out of a aluminum l33 and putting it in a iron lm7 block. Stock 799 heads,head studs ,ls9 head gaskets, 228/230-.585 lift 112* lsa cam, truck intake,etc... Backed by a turbo 400, 3.27 gears. I've read a lot of junkyard turbo info and it looks like 2 holset hx35 turbos will get me to 800whp. This is a bottom $ budget build. It wont be optimal but should be a lot of fun in a 28-3200lb fox. For fuel system ill be running E85 fuel, deka 80lb injectors, twin 340lph intank pumps. Any thoughts on these turbos for 800whp? Maybe some e bay knockoffs?? Looking for cheap "junk" that will get me there. BTW... This is a build that was made on a bet. "9s for $5000" Total... Thanks!!

 

Why not stay with the aluminum block?
And thats a lot of cam for a turbo 5.3.

 

Already have a complete "rod knock" lm7 engine. Stronger block and I can resell the aluminum block to "recoup" some funds. " budget build"

 

That same cam also made 825hp at 6100/718tq at 5800. Trying to keep the rpms lower to help I live. Under 6500

 

That aluminum block can handle 800hp easy enough. And less weight is like free horsepower.

Other than that, get bigger injectors. 800hp through 80's with e85 is going to be pushing on them pretty hard. I think some 1000cc injectors would be better suited for the task.

 

I'm using the iron block as I have one thats already honed and I can get some cash back out of the l33 block. Besides that I plan to build a forged 5.3 later for 1200whp and will then already have a iron block. As to the 80s... I know that's pushing them hard but I know skinnies made 1000whp with them and the price difference isn't in the budget right now...

 

Fair enough. Have any pictures of this pony?

 

Id put that rotating assembly back into the l33 and sell it as a short block. Get a Gen 4 5.3 rotating assembly. Stronger rods and flat top pistons. Local guys push these things to 1000+rwhp regularly on stock ****. stock rod bolts hell they reuse the stock bearings they had in them when they pulled the motors.

 

The aluminum 5.3 blocks are much much stronger than their larger bore counterparts. You might recoup $100 by selling the aluminum block. If I had to pick between $100 and 100 lbs, I'd go with the weight reduction.

 

I would go with the iron 5.3 and let the nuts spend big money for the aluminum 5.3 blocks

 

They're $100 difference in most places for the blocks.

Around here its 50-75 for an iron block, 150-175 for an aluminum block.
Why does everything think its 'big money'? I've seen people spend 100 times that to lose that same 100 lbs worth.

 

Not too worried about weight... This is a gutted foxbody.

 

Exactly! It's a lightweight chassis that has been further gutted in an attempt to reduce its weight even more. And the aluminum block is lighter.

Things that make you say, "hmm..."

 

May run the l33 block. Not sure yet... Not quite sure how to post pictures but ill figure it out. It's basically a bare shell right now as its tore apart to strip extra weight, scrape undercoating and seam sealer, and cut off or remove everything that isn't needed...

 

All of that work, and you won't use a block you already have to save another 100 lbs (which is more than the carpet, all of the sound deadener, and interior panels combined) because you'd rather have the $100?

Ouch.

 

No its not.

 

I've put the same cam in an LS1 before.

On a typical 5.3 with a tiny turbine chinese turbo, its a lot of cam.
Big twins? Not too much cam.

 

Tell me more... I know your the guy to go to cam wise little John...

 

your tactics confuse me. you know the guy is running twins and you say the cam is too big. now you say its to big for a small turbine single cam but not too big for a twin turbo deal...

 

I'll have to go with little John said. Not too much cam. Seeing as its his specialty and he knows his ****! I'm thinking about the cx racing t3/to4e stage 3 turbos. One guy made over 500whp on a stockish 350 at 10lbs. Their rated at 350whp each at 20lbs. I think 20lbs,e85 on a 5.3 and they should put down 650+... I could spray if I need more power... These turbos are only $147 and as their cx racing I'd trust them for a china turbo