Anchor

So I have a feeling that my turbo choice might be a bit wrong... And i'm going to experience a fair bit of lag.. Too late now, i'll just run them because i got a really really good deal. But what can i do to counteract the issue?

398 LQ9. TFS LS220's. Holley Hi-Ram.
9.5:1 cr
The cam is apparently 238/240 .605/.610 112 but i'm not 100% sure as we made some changes along the way. I will find out in the morning.

2x Turbonetics 10967bb. T72, Q-Trim, .96AR ball bearing.
2x RG-45 wastegates
Turbosmart Eboost street. Stock ECU with either HP tuners or VCM suite.

T56 & 3.7's.

My goal is around 1200rwhp. Or the limit of the 4bolt heads. Using E85 to achieve this power. Will have a pump fuel tune as well.


Will smaller dumps work? What size dumps and exhaust should i run? Was thinking 4" dumps and twin 3.5" exhaust.
I'm not really sure. Any help would be good thanks.

Jeremy

Sarg

iTrader: (6)

I think you will be fine. They might be a touch big for a 6 speed car, but with a good tune and well sized pre-turbo piping it should work ok. With an auto they would be great, but with the 6 speed try to get a good 2 step and run that cam by LilJohn or Martin to make sure it is optimized.

Anchor

What size pre turbo piping is recommended? The rest of the setup i currently have is 2010 camaro manifolds and the 1300hp treadstone intercooler with the single over radiator outlet. Nick Williams 102mm throttlebody.
So everything else is up in the air..

What is a good 2-step that people have had good luck with?

Note, this is mainly a street car. I will probably strip it every now and then. But mainly rolling runs and standing miles which are starting to pop up down under. Also a fair bit of circuit racing/time attacks, but power isn't the big issue there. Probably better to be laggy and stay off boost lol.

Sarg

iTrader: (6)

I am sure the MSD 2 step will work fine. As for the piping, the concensus by the experts is that 2.25 iis the size to go with until somewhere around 1500 hp. Keep it short and retain as much heat as possible in the pipes. If you can go thick wall tubing or pipe, I would as it will help retain heat.

Anchor

Thanks for that. I'll look into the msd.

Anchor

Anyone else?

Anchor

I've also been doing a bit of reading on the Holley dominator ecu setup. What would be better for my HP goals? Is the self learning/tuning fuction that reliable?
Does anyone in here have over 1000rwhp and can chime in please?

I already have the stock ecu and an eboost street. But that can be sold off..

Old Geezer

iTrader: (3)

Megasquirt pro???

Anchor

I read up on that and it doesn't seem to offer the same safety features of the dominator..

Sarg

iTrader: (6)

pretty sure you can toast a motor easily with either

Anchor

Good point. But it can't hurt to have extra safety measures.

Any thoughts on turbo sizes?

Sarg

iTrader: (6)

I would go twin Borg S362 or S366. But I am just partial to the Borg Warner turbos.

rkreigh

holley dominator looks to be a great system but it's pricey.

like to see what the megasquirt pro can do.

if you can "dump boost" with the wastegates if the car goes lean with one of the new failsafe Wideband guages, that would be worth the extra dough to save the engine

not sure how much they cost yet, but there is some info on the corvette forum about them (Bam Bam - Nick Yoslin's monster TT Vette)

the wideband and autoadjust tuning stuff in the modern computers is pretty cool and worth the price of admission

my new philosophy might be stock short blocks, with good computers and good turbo systems, if the short block breaks, go get another one, but with the solid computer system with safeguards and good tuning, it probably WONT

good luck with your project and keep us posted on your choice for the ECM and tuning.

Anchor

The price is really the only thing turning me off the dominator. And the fact i already have a PSI conversions complete engine harness and baseline tuned ecu. And an eboost street.

From the AEM site regarding their wideband failsafe gauge -
EXAMPLE ENGINE PROTECTION STRATEGIES
NATURALLY ASPIRATED, TURBOCHARGED OR SUPERCHARGED WITH STAND ALONE EMS OR PIGGYBACK CONTROLLER: Use the low side output to cut revs, retard timing, trigger a separate fuel or ignition map and activate an ancillary warning light. Users with turbos can also trigger the device to cut boost (may require separate solenoid). The aforementioned strategies are provided as an example. Available failsafe strategies will ultimately be dependent on the capability of the EMS or piggyback engine controller.

Also has data logging capabilities up to 3 hours.

qqwqeqwrqwqtq

Fwiw I'm not sure why people bother changing the PCM. HPT custom OS is bad ***.

I would only change engine management if I needed more than 8 injectors.

Sarg

iTrader: (6)

Integrated boost control (which I saw a screen that was inactive on hptuners for this!), nitrous, ger gear boost, launch control, autotune...there are some cool things in stand alones. But you are correct, the HPT custom OS is pretty cool too and looks like it has some fun tools on the horizen!

87silverbullet

iTrader: (11)

^^^Ditto.

As far as the Holley Dominator vs. AEM and the such, talk to 98z28cobrakiller on here he has dealt with and tuned most of them and can tell you why he went with the Holley setup.

Anchor

I've decided to stick with HP tuners for now. There's no point switching yet as i have most of the stuff. $2000 I can spend elsewhere.

Cam thoughts?

Sales@Tick

iTrader: (3)

I don't particularly care for the cam. I'd need to know some more specs on the set-up before recommending a camshaft profile for your set-up. What size are the turbines? I would like to see a tighter AR housing used if possible, but let's hear what you got first in the turbine department.

Anchor

This all the info I have.
Notes: Ball Bearing
T-Series
T-72
Q-Trim turbine wheel
.96 A/R

10967-BB
TURBO, T_SE-T72-68-TUNDO_96
Serial Number: T-51107 T-51108

I'll use them because they were dirt cheap. If i have to i'll change the exhaust housing down the track. What problems will i have with an exhaust housing too large?