MazdaManiac

iTrader: (3)

Oh, I'd definitely turbo the the V8.

guitarjunkie28

turbo probably won't do much to the rpm range. a cam will help with that.

THEN the turbo :D

Ajax

Personally, I'd supercharge it.. but even so.. i dont know what all he's done to the engine itself. I went through all my 2k5 pics and I don't have any pics of under the hood. I only have pics of the car itself which annoys me.


The LS6 actually has a really good rev range. I know peak horsepower on the LS2 engines is at 6000 and 6300 on the LS7.

guitarjunkie28

i thought one good thing about the v8 swap was you don't have to spin them very fast to make power. if you like turning 7-8k, stick with the rotary. it'll at least live at those rpm ranges happily.

rotarygod

If you don't want to spin an engine fast to make power, just install a Powerstroke or a Cummins diesel.

MadDog

Yeah. There's a Powerstroke F350 here in town that runs 12.8's - AT 5500 FEET ELEVATION!!

Razz1

I don't like the turbo with the Renesis.

I don't believe they have reliability. I belive Pettit Racing.

Look we already have blown Greddy turbo's.

Great job on the tume Scott.

I''m waiting for linear power and reliability with a Super Charger.

I've already passed Turbo's on the track during the hot summer due to heat soak.

Then when it's cool I loose out to the same drivers and cars with the turbo's.

Super Charger here we come!

guitarjunkie28

define "fast" 7k is rediculously fast for a big block.
8k isn't even redline for the renny or s2k motors.

MazdaManiac

iTrader: (3)

What makes you think any of the drawbacks you describe don't affect a car with a belt-driven supercharger?
Heat soak? On a car that is moving?

You need to do a little more reading before you consider anything.

rotarygod

I was thinking anything over about 3K!

zoom44

back on topic- i am having a hard time wrapping my brain around that hp increase at 5 psi. maybe scott can help us out with this by letting us know which turbo it is?

MazdaManiac

iTrader: (3)

^^ Indeed, though that would only make the discussion more interesting, not more comprehendible.
He is still going to have to explain how he got 520 CFM or more of air and 2000cc of fuel into the Renesis at only 7600 RPM.

Ajax

Well, if you think that's ridiculous, how about a 10.9 or 11.1 compression ratio on a non direct injection vehicle? Seriously, the gasoline world needs to get direct injection going in every aspect, not just the little 4 cylinders.
I probably haven't done enough research on that, but is anyone doing DI on anything other than 4 cylinders yet (non diesel of course)?

Whoops.. we're back off topic..

I'd love to hear from scott on this one too.. 5psi/300hp would be totally awesome for this motor..

maxxdamigz

iTrader: (1)

Perhaps this is a fundamental question, but where is boost measured? Generally speaking, a NA engine runs with a negative gauge pressure in the IM. I don't have a good value to estimate how much vacuum a WOT Ren generates at 7-8k rpm. Is boost measured directly after the compressor? How would that compare to a MAP sensor reading? And in a 5psi boost application, where is it 5 psi gauge?

Brice-RX8

Yes Audi's RS4 V8 has DI, as does Lexus IS350's V6, and I think the new twin-turbo BMW 335i motor has it as well.

Please continue with topic.

guitarjunkie28

dissle bebe!!

MazdaManiac

iTrader: (3)

Uh, I'm sure that would be manifold pressure at least! 5 PSI at the turbo outlet would only be 3.5 PSI or so at the IM.

Well, if they would perfect the CV transmission, that would be a good option.

FlyingLeggs

[QUOTE=MazdaManiac]No, its still on.

400 RWHP at 15 PSI? That is a PR of over 2.
What is the typical RWHP number on an FD at its stated 255 engine HP?

Do the math! You are still in fantasy land if you think an FD is going to put down 300 RWHP at a PR of 1.3. Hell, its OEM tuning is hotter than that and the RWHP is barely 2/3 of this claim.



I ride around in a FD that puts down over 300rwhp on a regular basis bro. And it is set up under 14psi.

Second note. I don't think that you have realized or atleast noted that other modifications have been made to Scott's test car. I know that n/a mods are small but Scott has gotten well over 200 rwhp on an n/a 8. So begin your scientific brake down from 200-210 not 180....big difference.

Edit: Yeah I know I jacked up the quote boxes.......

rotarygod

Just give it up. I don't want to see more posts of math problems that have the wrong variables plugged into the proper formulas.

Japan8

Actually, Mitsubishi is probably the leader in Direct Injection and has been using it (atleast in JDM) for quite some time now... and not just in 4 bangers.
http://www.mitsubishi-motors.com/cor...ent/e/gdi.html

http://media.mitsubishi-motors.com/p...detail443.html

http://www.autozine.org/technical_sc...ne/petrol1.htm
Sorry for the thread jack. Back to your regularly scheduled turbo programming.

MazdaManiac

iTrader: (3)

Do you put down over 300 HP with 5 PSI?
Of course something under 14 PSI will do it. That isn't the point in question.

FlyingLeggs

On Scott's turbo I will.....

guitarjunkie28

is scott keeping the details of the turbo a secret, or do we get to know the specs?

Nemesis8

iTrader: (3)

Does Scott control the SSV and VDI and APV valves with the InterceptorX?

swoope

iTrader: (5)

pretty sure he does.

beers