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What's everyone's opinion on 93 octane gen4 5.3 max intake temp turbo charged.
If you were to step up to 110 race gas what would be a safe number.
I have a friend with a turbo s10 wanting to keep the setup as simple as possible and not run e85. Gt45 China turbo, no intercooler, stage two lil John turbo cam drag race only application.
Only planing on 7-12 psi wants to run 6.50 index to the 1/8mile with it.
Thanks for any responses.
Mine is a s10 on3 88mm 5.3 block and spins the whole track and runs 6.60 he needs a better goal he can do work with that setup for sure I run a intercooler in front of the radiator and temps stay down around 200 but now I'm putting the methanol on dual nozzles and leaving the intercooler off I wish I had some data for you already but in a couple weeks I will p.m. me if u dint find a good answer in a few days I'm working on finishing mine up with the new short block as we speak
Also mine is on 93 pump gas non e85 with the iat sensor pulled out of the mass air flow and used with a speed density tune not sure what setup he uses but this one was real clean and simple
We understand it's much more capable with a intercooler and turning the turbo up but that's not the goal 6.50 is the goal for a local series.
Truck is tubbed and back halfed, ladder bars, and a 12" wide slick it's going to hook.
The truck should hook great I don't have that good of a rear suspension I'm just 275/60s and cal tracs and 8psi does 6.50 I'd love to have yalls rear setup tho so you shouldn't need to turn it up being a track truck I think y'all would be fine with no intercooler
Well we took it to the track made it to 4th round in no box. Had nothing but issues. Wide band failed first pass. Didn't have a back up.
We also couldn't get boost down with the single 38mm waste gate. It would blow right past it and shoot to 200kpa. I had boost cut set to 165 kpa so it would then fall on its face. In a last ditch effort to make some passes we pulled the waste gate off to basically run it on motor. Last round It went 7.778 on a 7.78 dial not getting into boost until past the 330. Would still hit boost cut about the mile per hour cone. Plugs looked good and we turned the timing to 2* of timing to keep it as safe as possible.
Going to order a couple wide band sensors and another waste gate and take it back to the track saterday. Inlet air temp max all night was 185*
Well we took it to the track made it to 4th round in no box. Had nothing but issues. Wide band failed first pass. Didn't have a back up.
We also couldn't get boost down with the single 38mm waste gate. It would blow right past it and shoot to 200kpa. I had boost cut set to 165 kpa so it would then fall on its face. In a last ditch effort to make some passes we pulled the waste gate off to basically run it on motor. Last round It went 7.778 on a 7.78 dial not getting into boost until past the 330. Would still hit boost cut about the mile per hour cone. Plugs looked good and we turned the timing to 2* of timing to keep it as safe as possible.
Going to order a couple wide band sensors and another waste gate and take it back to the track saterday. Inlet air temp max all night was 185*
You were hitting boost cut with no wastegate? Post a pick of the hotside, the wastegate must be in a horrible spot if that's the case.
9lbs and no WG is pretty crazy! Any pictures of the WG location?
IMO if everything else is healthy 200* and under is pretty safe... Watch the plugs close on hot air setups. Setting it up to pull timing based on IAT is a good idea IMO. Are you saying you ran 2* of total timing?
Instead of an IC you might try water/meth kit mounted pre-turbo. You can make it yourself super cheap if cost is a concern and they take up little to no space. Makes a huge difference for the cost.
Last edited by Forcefed86; Jun 6, 2016 at 12:22 PM.
Both flows of exhaust are pointed at the waste gate.
Yes 2* of timing in boost. You can see it in the graph. I locked it out at 2* tell the truck physically went down the track. So once we got it going a to b we could start adding timing to make it mph hard figuring it would be fun to 10-20 mph all the other index cars in the class. Have a second waste gate coming.
I will bump the timing 5* and the second waste gate shipped today.
Yeah the manifold is cobbled together but it works and allows the closest placement of turbo to motor.
Sorry, didn't mean it in a negative way. I think a lot of people overstress how "perfect" a manifold/turbo kit should be. I love seeing the home built quick and dirty systems. Really shows anyone can do it with a little time and effort and it doesn't have to be pretty to work well. 500-600hp turbo small blocks can be made for peanuts these days, wish there were more of them!
Let us know how it goes...
Last edited by Forcefed86; Jun 7, 2016 at 12:34 PM.
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Intake air temp non intercooled 
That manifold rocks! Yea I'd try getting a "normal" amount of timing in there. bump that sucker up to 8* with the WG removed and see what it does. 