hellbents10

iTrader: (10)

Billet Garrett 88mm by Jose at FI.
BEI cam and E85 with an air to air cooler.

Meth Sled

iTrader: (1)

Clean pull, 6.0?

SSZ

Yeah TJ we need juicy details on that puppy!!!!

hellbents10

iTrader: (10)

Forged 6.0 10.5:1 compression
Ported 317s
BEI cam Tooly spring kit
Built 80e.
Pretty basic setup, I have attached the dyno sheet.

IronBlocked

1060 thru a 4l80 that's like 1250-1300 at the crank on a 4bolt 6liter, wow

Forcefed86

iTrader: (4)

How much boost?

eaglegoat

Are you running a dome piston or did you mill the hell out of the heads?

dmaxvaz

iTrader: (1)

The heads have been ported extensively by Headwinds, the engine is pretty basic: je dished pistons, k1 rods, stock crank, 10:1 compression. The turbo hot side is a cast t6 manifold, cross over pipe and a hood exit I made, with a 60mm wastegate. Btw TJ, I got a ride in it the other day, and it rips ***!

oscs

iTrader: (19)

X2 lets hear it

hellbents10

iTrader: (10)

23-24psi. I bet it gets down on the street! I didn't get a chance to do any street testing with it other then idle and drive ability on power drive here.

justuc

im guessing on E85? or methanol injection? that gives me hope, I've been kinda weary about my build going to be 10.2 to 10.4 to 1 compression but now i see a 10.5 -1. sweet pull man

oscs

iTrader: (19)

Just because people do it, Doesn't mean it's the best route. These guys know what they are doing. I would not consider anyone cutting there teeth on 10.5:1 combo a good idea.

dmaxvaz

iTrader: (1)

10.5 is no problem with e85. Buddy has been at it for 2 yrs, hundreds of passes at the track. 18.5 degrees timing and has gone up to 31 psi. Stock crank

dmaxvaz

iTrader: (1)

it's actually at 10 to 1 comp or slightly lower

hellbents10

iTrader: (10)

I herd it went single digits letting out early.

Forcefed86

iTrader: (4)

That’s a pretty misleading statement. My 10:1 5.3 detonated hard on e85 with 17* at 25/26lbs. (Slightly less than 10:1 with the LS9 HG.) Yet held up for many passes at 15* and 24lbs. Cam, backpressure, CC design, and bore size, all play a huge roll. The more base compression you run the more narrow the tuning window will be, period.

oscs

iTrader: (19)

And who said it isn't possible? Because i didn't. I swear this High compression + boost band wagon that everyone is on makes me laugh sometimes. It amazes me that people ignore simple combustion principals or assume technology has majorly altered the way it works.

Again, I'm not saying it cant be done or its a terrible idea. I'm simply saying that when playing with high compression and boost, You better have your **** together or you'll pay the price, period.

asubennett

iTrader: (6)

High compression and boost is wonderful for area under the curve. Application plays a lot in the decision tree for CR in my view.

If this is primarily a street car, stop light warrior, weekend outlaw type deal on E85 then higher C/R is amazing.

If it's a track only deal, area under the curve is not as important because it will live from launch to end of pass near the peak of the curve. To the OSCS point you can make up the loss of power from lower C/R with simply more boost on the big end.

dmaxvaz

iTrader: (1)

Let me guess, your fuel system was less than adequate? Yes it's true, tuning window is smaller. It's why I chose 9.5:1 on my own build. I didn't choose Justin's compression, he had his relative put the engine together. He does have large injectors/fuel system/pump so it helps.

justuc

Didn't mean to cause a uproar. I'm in the same boat as your buddy I bought lower end for N/A but then got on this turbo bandwagon. Plan on gettin 317s reworked and then prob use ls9 gasket to try to lower it a lil more. Wiseco piston chart showed 10.4-1 at 68cc heads so think I might b able to get it low enough. And that's what mine is gonna be a weekend warrior and take momma to eat kinda truck.