Boostedballs

iTrader: (1)

I am building a late model nascar chassis to run a mariad of events including: local drags, standing miles, local road course, silver state classic and the long course at Bonneville.
I realize that there will be tradeoffs due to the different conditions on each course but I am looking for a pair of turbos that will have enough response to get out of the turns as well as enough top end to pull top gear to 7k. I'll have a custom cam and ported 317 heads and 9.5:1 cr running 110 octane and air to air intercooler, fast 92 intake and open tubular exhaust. I would like to see 800-1200HP.
I like the V-band turbine housings, billet wheels and ball bearings but none are required.

stevieturbo

It's a modest power goal, a pair of SXE362's or 364's would easily get you there.

eg

http://www.agpturbo.com/borg-warner-...8-13009097008/

I wouldnt even see any need to use the larger 73mm turbine wheel. I've 364's on mine and do everything you're asking, albeit I only use pump+meth and a slightly lower CR.
TFS heads though.

If budget permitted you could go for something similar in BB, eg a Precision 6466 or 6266.

I just didnt see any gains being worth the extra cost. And when racing as rpm's would always be over 4500-5000rpm anyway...spool has never been a problem for me with any usage. Yes it could be better here and there but it';s never been anything that pushed me to change anything on the car to improve it.
Almost the opposite...actually just got a pair of larger turbine housings to try to see how it affects things.
The little hole in the 0.88 always annoyed me lol, even if pressure ratios are always around 1:1 anyway
The new 0.96 seem huge by comparison, but wont be fitting them until the winter

Boostedballs

iTrader: (1)

Thanks for the info!
I can't seem to find any with a v-band on the turbine inlet. I'm surprised they are not an option for a lot of these racing type units. Seems like it would be cheaper to manufacture too.

stevieturbo

Someone out there might make a v-band housing, but unless packaging reasons really dictate you need one, it is more of a novelty.

If it was really essential Bullseye make a 1.0 v-band for an S300

http://www.bullseyepowerstore.com/pr...0-628b1f511565

Boostedballs

iTrader: (1)

Those are some sweet housings! So do you think a couple of the s300's with .88 t4 housings will make good power on a 6.0 lsx between 4-7k rpm? I can get a couple of those for cheap.

stevieturbo

Depends which S300, there are quite a few.

All of them will be capable of making good power though

Boostedballs

iTrader: (1)

these are part number 177272 with open t4 .88 hot side, not sure which compressor though.

stevieturbo

For an extra few hundred, I'd just go for the billet wheel version. Overall it's a better unit, will flow more spool same and has better bearings etc inside

http://www.agpturbo.com/borg-warner-...-68-billet-62/

The 362 would also have a slightly smaller compressor cover, if space is an issue

Forcefed86

iTrader: (4)

Go to thmotorsports if you buy the new SXE line they are MUCH cheaper than AGP... I believe they are selling the SXES366 super cores for $584 shipped. And $152 for the exh housing.

Saves you $250+ a turbo anyway...

cajundragger

iTrader: (2)

AGP recommend two of these for me.

800whp. I'm building a 388. 4.125" bore. 3.622" stroke. road car/standing mile.

http://www.agpturbo.com/borg-warner-...-turbocharger/

with the .82 v band exhaust housing.


You're going to give up some performance on the B-ville long course to satisfy your other goals. The long course seems to be all about 100+mm single turbos.

stevieturbo

I'm sure those will easily make 800.

And agree..if the car will see a lot of long duration stuff, I would definitely aim a little bigger for the turbos just so they arent pushed so hard.

1/4 mile is easy, 1/2 a little less...mile is much harder on an engine, but some of that big stuff you maybe to 2-3 miles ? maybe more ? That's potentially a lot more heat etc if you were pushing the compressor hard.

As for single vs twins...really just down to packaging I'd say. Some say a single is more efficient for top end stuff...I really doubt there is much difference if the units are correctly sized for the job in hand.

cajundragger

iTrader: (2)

the big course is 10 miles IIRC.

also- something light and agile on the road course is far from fun on the salt. On the salt it can't be heavy enough and the turbo can't be too big.

are you planning to use bolt on plate weight or something? If that's what it is be mindful of them coming loose in a wreck.

Boostedballs

iTrader: (1)

I have lead weights to bolt to the lower ortion on the main hoop of the cage. There is also a weight bracket inder the car.

Boostedballs

iTrader: (1)

i think I will go that route and I am still deciding on s362, s364, s366. I cant seem to find a good comparison.

I am expecting to run the s300's with .88 housings as an almost one size fits all. I'll probably swap housings around to match the course and diff ratios. Does this sound like a good plan?

stevieturbo

Even within that housing there are 2 turbine options, 68 and 73mm.

I doubt you'd go wrong with any of those in the SXE versions though. For the long duration stuff...the alrger turbine might be nicer to have, but it's bound to hurt spool a little if there is any tight slower speed stuff. Whether it's really an issue or not...would be up to you.

I've a pair of the 364FMW's on my 383 with the 68mm turbines. And TBH I really cant fault them. Although I have bought a pair of larger 0.96 turbine housings to try.
I do not have any backpressure issues at all, in fact it's excellent...but the hole inside the 0.88 housing is tiny ! and just something that bugged me. I only recently seen there are larger housings available, so bought a pair. Wont be fitting til over the winter though

LJMSJohn

How did someone grind you a custom camshaft for a turbo combination.... without knowing what turbo's you were going to run??

Boostedballs

iTrader: (1)

I do not have the camshaft yet. I am shopping for turbos first.

LJMSJohn

Ahhh Sorry my fault

Pair of Billet 366's from Forced inductions IMO is the way to go. Using the standard S300 units and not the SXE's. 68mm turbine and the .88 turbine housing.

stevieturbo

Standard 366SXE has the 73mm turbine ?

Given small price difference...why choose the older unit vs the SXE ?

What does an aftermarket 66mm no brand wheel offer using a standard S300 core vs the SXE factory billet wheel with their heavy duty bearings etc ?

Boostedballs

iTrader: (1)

Pardon my ignorance but when I research the s300 series, I don't see the models broken down into 362, 364, etc. I just see columns of s300's with the wheel dimensions, etc.
What am I missing?