I'm starting to rebuild my maverick that is going to have a 5.3/th400. I'm curious as to how well twin s366's will work on a cam only 5.3. If it's not going to work well I'll go with an s480 (goal for stock long block is 800-850whp). Main reason I ask is I have 1 s366 already and I could save some money there, and have never done a twin setup and think it'd be cool lol.

 

80/73 turbine? I'm sure you could get it to spool, and work, but it'll need rpm. I personally would run something smaller if any more than a high rpm track setup.

 

Yes 80/73. It's going to be a 50/50 street track car.

 

All depends on what you want. With decent head flow, a cam, rpm, and a brake, some are running twin gt45's on 350ish cid. Forcefed86 ran twin China 7268's for a bit, but switched for a pair of gt35's when they didn't respond well. I think you'll be happier with the single, or smaller twins.

 

A few things. You won't make 800 to the ground on 93 octane. You can make between 500 and 600 to the ground on 93 and some 50/50 meth injection, possibly up to 650. With that said, you can go well beyond that number with E85 and one of the perks of E85 is that because you have to burn so much of it, you get the spooling effect of more displacement. So E85 is definitely something you want to consider. Also, get the damn billet wheel on the S480!

 

Im going to be running e85(flex sensor e85 at track 93 on longer trips where e isnt available). Plan for the car as of right now is 05 5.3(which may have gen 4 rods, haven't taken apart yet) btr stage 2 turbo cam, th400 w/brake, custom converter, ms3pro, magnafuel 4303, bosch 210's, sumped stock tank, 8.8 w/ 3.08 gears. Pretty much the only thing Im unsure about is twins or big single. Was leaning more towards twins as I would think it'd be easier to make a full exhaust system.

 

If it doesn't have the gen 4 rods (raised bump on the body), rockauto has them for like $40 each. Step up, go BTR stage 3. Dunno what kind of mph you're trying to run but even with a th400 the 3.08 gears are pretty low. I had twin GT35's on my fox body and pulled them off immediately because the exhaust was dumping out in front of the fenders and there simply wasn't a good option for routing it back to the exhaust. Do yourself a favor and do something like the hooker turbo single turbo header and go with the S480. You can then just use the ICT billet accessory brackets to put the PS and alternator on the driver side and then turbo on the passenger side.
Oh and it's expensive and it's not hood friendly but take a good hard look at that holley high ram intake with the integrated water to air intercooler. It's a great piece.

 

A 05 most likely has gen4 rods. 13mm headed valley cover, and exh manifold bolts typically go with the rods. Research the hi ram before you go that route.... unless you plan to live at 5000 rpm and above, the tbss is a much better choice for an intake imo.

 

I'm hoping to eventually get the car to run mid-low 9's so mid 140's. I'm hoping I can get away with the 3.08 so its not screaming(below 3k cruising at 70, 3.27 also a consideration). I'm on a somewhat tight budget, and cant swing the high ram, could be something I look into for 2020.

 

The high ram is appealing when coupled with that air to water intercooler. It's tall but the piping gets easier and the results are hard to beat.

 

Because..its impossible? Never been done before?

 

Because a 5.3 or 6.0 LS motor; no matter what cam you use, or what intake you use simply won't make that number without more octane. On E85 it will make it because E85 is essentially 100 octane. Now you can spray in 6 gallons a minute of 100% methanol and get close, you can spray and pray with nitrous but it better be on a dare.

 

I'll cop to knowing next to nothing about LS motors, but whats going on here? : https://www.stevemorrisengines.com/engines/ls/1-000-hp-ls3-turbocharged-package

This is a lot bigger motor, but : https://www.hotrod.com/articles/hrdp-0612-1740-hp-on-pump-gas/

Just wondering what it is about the LS that makes IT "octane limited"?

 

Simple, the first one is 413 cubic inch and it costs $27,000 dollars. The second one is 572 ci and who knows how much that one costs. My statement was for 5.3 and 6.0; those are 6.7 and 9.3 and with those you get everything you pay for.
You either need more displacement or you need more octane to go higher.

 

I'll argue that you don't need more cid, but you need more head flow, and rpm. The stock cathedral port head is a decent flowing head, but it's not great. Don't see why you can't do it with some airflow, and meth injection.

 

This makes sense to me.

 

I dont' really agree. The main issue is the fuels knock suppression at higher boost levels. That is directly related to the base compression. Throw a 317 head and a LS9 gaskets (or thicker) on a 5.3. With the right cam and intake combo, loose converter, and alot of gear... I think I could make 800+ on 93 octane easy. Esp. with an A2W IC... It would be doggy out of boost, but I don't mind that personally and the loose converter and trans brake would launch it easy.

The 72/68's were just a crap turbo I think. A real S366 is in a class of it's own. Exh. and Comp. wheel are more efficient than any china turbo I'm aware of. Lag would be liveable with on that combo IMO... if you set up the part combo correctly.

Chris Bishir is on a mild cam 5.3 combo with E85 and no intercooler on S366's. His combo flat out works... He won his class in drag week, so there's no doubt it's street friendly.

 

Chris no doubt has a great setup and a highly impressive speed but truth be told, a 2600lb truck with 750hp will run 162mph in the quarter as well.

 

Calculaters I use put a 2600lb car going 162 at 908hp. And trapping 152 at 750.

And chris's truck is 3250lbs.