I'm thinking about shifting my power-adder on my MTI built 422 from nitrous to FI, and leaning towards a turbo install. (Getting tired of refilling the bottle). How much of my existing setup would be thrown to the wayside if I made the switch? I've heard the the resleeved block should hold up well, and I've already done all of the drivetrain upgrades to support 750rwhp+.

What do you guys think, should I check it out, or leave well enough alone?

Thanks

 

Sean, I'll email you some insider trading info tonight! <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

 

What compression ratio are you now?

What's your HP/TQ now?

 

Honestly, I'm not 100% sure what my compression ratio is, maybe one of the MTI crew or Tony could chime in. (I didn't have them alter it from whatever their norm is)

640rwhp, 740ft/lbs on the 100 wet shot
490rwhp N/A

Through a KTRE 12 bolt(3.42) and an 2800rpm stall, ls1 stage III heads, R1 cam, cf driveshaft, all the suspension stuff (subframes, lca's, chassis-tech tq arm, etc), t-rex inline fuel pump, 42# injectors, ported throttle-body, ls6 intake, etc, etc, etc (and it's an auto)

The car is rock solid now, no issues at all, it runs hard, tons of SOTP effect, I'm just looking to try something new, and the idea of a turbo 422 sounds mean as hell.

Thanks

<small>[ May 01, 2002, 03:51 PM: Message edited by: Currdog ]</small>

 

I'd sell the heads and get a set of ported 6.0 heads to lower the compression ratio. Upgrade the injectors (and maybe the rest of the system?) and then just add boost <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

J.

 

Thanks for the response,

Was what I heard right about the resleeved block not being an issue true? Also, would you guys tend to agree that a turbo would be the way to go, instead of a supercharger (I don't want to start a religous argument here, just asking), One of the main reason's I'm leaning toward turbo is I like the idea of a boost controller, that I can turn up when I'm on race gas, and turn back down for daily driving...

Sean

 

Here are some things I would look into and do

- Get a new set of 6.0L heads ported to drop the cr. Your probably around 10.5 or 11.1 right now(just guessing) Shoot for 9-9.5:1.

- You said your drivetrain is good for big power. Is your fuel system going to be up to the task. You might want to consider a twin intank setup and some new fuel rails+lines with adjustable fuel regulator. Oh don't forget the BIG 50#+ injectors. You will need some gadgets to run bigger injectors than that.

- Make sure your block is studded and get some good gaskets. You might even want to o-ring the heads. The resleeved block should be fine as long as you don't get crazy with the boost. <img border="0" title="" alt="[Razz]" src="gr_tounge.gif" />

I don't know how much power your looking for but, I don't think you'll need to run more than 5-7psi from a super or turbo to put down some huge numbers.

Rob Raymers turbo setup looks real nice. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> Have you seen what it did on a stock cubic inch motor. <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> Golden West Performance is getting some awesome numbers with there Procharger kits also. In the end it comes down to what you want. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

If you go 9-9.5:1 I don't think you'll need to worry about race gas because with only 5-7psi that car will be SICK <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" /> and run on 93 all day long.(assuming good tuning) <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Thats my $.02 <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />

John

<small>[ May 01, 2002, 06:04 PM: Message edited by: XLR8NSS ]</small>

 

Iam interested to know about that too. My MTI 422 motor will be ready hopefully within a week.

Just my $0.02, talk to Jayson. He won't steer you wrong <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

 

<img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />

I'll bet your CR is currently 11.0:1

Maybe you could talk Jeff @ MTI into building a custom single-turbo setup for you. I know you want to smack down the Supras <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

Tony

 

Thanks for all the responses guys. I traded e-mail with Jayson, he's going to get a part list togeather for me, and we'll get rolling...

I can't wait to get some of the details, so I can start dreaming of how 7psi is going to feel on the highway from a 60 roll... <img border="0" alt="[Burnout]" title="" src="graemlins/burnout.gif" />

 

Here's what to do, and save some money.

Get the turbo. Sell the 422. Get a built 346. This may end up being a wash in price.

My logic is this: A turbo 346 has more than enough potential to outflow the intake manifold as it is. Just get 8.5:1 pistons instead of 9.0:1 and turn the boost up 3 or 4 more psi. I'll bet an 8.5:1 346 at 10 psi will produce the same power as a 9.0:1 422 at 7 psi. And it will run on the same fuel. But talk to someone who really knows octane/power/compression ratio/displacement.

With the current intake manifold designs, stroker motors and turbos are a waste of money. The only possible advantage is possibly less lag.

 

Mark,
Sounds like a good way to save some cash, but I have to ask, If there is no advantage in running the turbo's with a stroker, why is liengenfelters 427 turbo such a big deal?

(I am not trying to be a jackass here, I just want to understand your opinion)

Thanks,
Sean

 

Ported 6 liter heads with port matched holley manifold.
compression around 9:1
Robs turbo kit with 50-55# injectors
dual parallel pump setup boost referenced regulator, custom lines and rails
good catback
good gaskets
good headbolts
5-7psi
LS1 Edit tuning. Would be cool to do two tunes. Reflash the PCM with the laptop at the track or have two PCM's. One tune for race gas and more boost and one for pump gas and street driving with 5-7psi.

Would be sick and you would have to hold on for dear life <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
Cheers,
Chris

 

I have a feeling simply matching the holley to the heads is not completely the answer

Time will tell what a lower CR 346 cu in motor will do on boost <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

FWIW, running SVO 42's i was out of injector by 12 psi. Just under 600 RWHP

fueling the monster is the problem. Not to mention getting the PCM to read the air you'll need to make that power.

 

Just out of curiosity, what kind of power do you guys think the 422 with a 9:1 CR and 7PSI would make at the rw?

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Currdog:
<strong>If there is no advantage in running the turbo's with a stroker, why is liengenfelters 427 turbo such a big deal?
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">The owner of the silver Ling TT 427 couldn't decide whether he'd rather have the the 427 or the twin turbos, so he got both. At least thats what one of his (the owner, not Ling) employees told me.

www.427tt.com if you haven't seen it.

edit - its on page 84 of the newest Motor Trend

J.

<small>[ May 03, 2002, 04:52 PM: Message edited by: Crazyquik ]</small>

 

CHris you nailed my setup almost exactly....cept for big injectors. I just cant afford the msd 50s....they are like 500 vs 300 for the svo42s. Once again, how fa$$$$$t do "I" want to go.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Currdog:
<strong>Just out of curiosity, what kind of power do you guys think the 422 with a 9:1 CR and 7PSI would make at the rw?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Well, this is just a guess.

I would say high six hundreds for rwhp. The torque would be insane with a turbo setup, probably close to 800ft/lbs. <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />

The motor would probably be only a little more powerful than with your 100 shot of N2O but, it would be ready anytime you needed it. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

Thats all just guessing though. Do it and see if I'm close. <img border="0" alt="[judgement]" title="" src="graemlins/gr_judge.gif" /> <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

John

 

XLR8NSS, you give such GOOD advice. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
... studly... but, good. <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Currdog:
<strong>Just out of curiosity, what kind of power do you guys think the 422 with a 9:1 CR and 7PSI would make at the rw?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I think the guy that used to have the red SS or z28 in the Dallas area made over 600 at the wheels with his 382 and about 6 psi. ( I think this was his combo.)

Your torque might be alot better, I am not sure about the horsepower. I am not sure what kind of hp the your intake will support.