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Re: Gen 1 3.5L Twin Turbo [Re: MontyMcV] #961771 09/03/09 06:18 PM
Joined: Feb 2004
Posts: 10,238
FrankR Offline
Web Wheeler
****
He might be able to use the 3.5L exhaust manifolds from a Montero and modify the TT setup from there.

Frank


'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum
Re: Gen 1 3.5L Twin Turbo [Re: FrankR] #961772 09/03/09 08:12 PM
Joined: Aug 2008
Posts: 1,186
0778drz110 Offline
Body Damage is Cool
There are 2 of us up in Sarasota. <img src="/forums/images/graemlins/cheers.gif" alt="" />


'88 Raider, 33" Maxxis, 2" body lift, 10K winch
Re: Gen 1 3.5L Twin Turbo [Re: 0778drz110] #961773 09/03/09 11:28 PM
Joined: Jan 2002
Posts: 6,134
TOASTY Offline
Trail Leader
*****
The aussies have a supercharger kit for the montero and i have pics somewhere of one of Padokku's 3.5L twin turbo pajeros and I read somewhere that Jackie Chan has a twin turbo Pajero That Mitsu built for him. I'll work on links for you later but you'll need some Japanese translation to read the details but the pictures are nice.


1999 Montero SAS'd on Kings and stuff

1998 Montero trying to get a V8 Swapped
Re: Gen 1 3.5L Twin Turbo [Re: TOASTY] #961774 09/04/09 12:09 AM
Joined: Jan 2001
Posts: 13,649
fasteddy Offline
Web Wheeler
*****
I see the problems as follows. I don't think the 3.0 fuel maps will match up well with a 3.5/3.8 swept volume.

I don't think you can use stock pistons with the too high compression ratio with even a low boosted turbo. 6-7psi on pump gas would be my bet. This means custom low compression pistons in the 8-8.5:1 range, and if you are going there, that means forged probably.

I think I remember that there is not enough clearance dside for a turbo due to brake booster. I had thought about running a stock dside exh mani, and use the existing downpipe as a crossover pipe down to just short of the wye, then turning that uphill to a new turbo plenum (all turbo heat shield wrapped to keep the heat in the gas), which is part of a new pside sch40 weld fittings manifold. Then set a 450cfm at 12psi turbo on that new mani. FrankR had a link I've lost to an aussie co IIRC with precut 1/2" mani flanges with the correct oval port for the 24v heads. I think 1.5"i.d. for the front and rear cylinders may be the right size for the runners, but you'd have to go 2" I think to torch heat/vice squash the weld ells and center cylinder 4 way cross to match the flange oval port.

Not as sexy as the TT, but the turbo should pump enough air for 300hp at 12psi.

I think you need a megasquirt or similar fuel/spark system.

I see a grand or nearly in pistons, rings, and piston coatings (heat shield crowns and low friction skirts).

I see another $700 in injectors, MS ecu and harness, plus a fuel pump for another $150 or so.

I see roughly $5-700 in new exhaust fab just to get to the turbo, and I think you need a min 2.5-3" exhaust plus low restriction cat plus straight thru muffler and tail pipe. This cat back will probably run another $500 bent and hung.

I'd want stainless to the cat.

I think the radiator needs to be upgraded to 3row core.

I think you need an intercooler at 12psi, or anything over 6psi, really.

I really like this idea, esp. if you use the 6g75 block for the max displacement.

I think a mitsu 14g turbo (not the 14b eclipse turbo) would be a nice real fast spool turbo with an air delivery of around 465cfm at 15psi, and you could stay in the center of the turbo map in the 65-70eff range. The next upgrade would be some variety of 16 mitsu turbo.

I betcha this would see full boost by 3k, 7psi by 2600, and the montero a/t has a loose converter with a 2400-2600stall, almost perfect.

When I was build my 2.6 turbo motor, I talked to a mitsu driveline engineer who stated the KM148 a/t was good for an easy 300ftlbs of torque, and needs no computer. I've had tranny shops tell me the slushbox can be build to hold 400ftlbs. I'm sure we see close to those numbers on some of the 2.6T motors in use by memebers of this board. I haven't seen a 2.6t a/t failure on here yet, except the one I broke the oil pump gear on by not socking the converter all the way home on the 2nd half of the tranny r&r, and it ran a few hundred behind the turbo before it fried o/d.

I'll tell you the 2.6 swb turbo with a/t is pretty sweet and much more drivable than stock. It's what the factory should have built, and mine would surprise 5.0 mustangs on a regular basis.


Not responsible for advice not taken...
Re: Gen 1 3.5L Twin Turbo [Re: fasteddy] #961775 09/04/09 05:07 AM
Joined: Sep 2009
Posts: 476
MBrannon Offline OP
Mudrunner
Thanks for all th replies. I'm buds with John Monin (wrenchmonkey) and [email]Hanz@GZP.[/email] Known them for years. We are all old school 3000GT guys.

I've done a handfull of 3.5L swaps in 3000GT's. Easy cake except for the oil pan issue. That is one of my biggest concerns with the Montero, although I think a 2" body lift would help out quite a bit with that and other clearance issues.

0778drz110, well have to get together some time and hit the mud. I try to hit the mud at least twice a month. Any good spots up there? I have a couple down here.

FrankR, sweet setup you have there. I love the SOHC. Great motor. I had a 3000GT with a SOHC in it. I eventually swapped in a dohc twin turbo, but the sohc was great for reliability. If you have 20 minutes to kill here is a video of me killing the sohc. Pretty entertaining...

http://www.import-power.com/vids/Pandadeath_3SXPerformance.asf

What Monteros had a 3.0L dohc?

TOASTY, would love to see some pics of the 3.5TT Pajero!

fasteddie, you have a good point with the fuel and timing maps. I could definitely tune around them, but I'd rather not have a bunch of electronics plastered in this car. This makes me lean more toward a 3.0L straight out of a 3000GT. I can pick up a wrecked vr4 for around $1000 and have most of the parts I need. Run it with stock injectors, pistons, coil pack, turbos, and ecu. Wire in the atx tcu and it should run like a champ. With an upgraded fuel pump I can run 15psi on pump.

If I go this route I'd still need to figure out an oil pan, oil pickup tube, and upper plenum. Perhaps I could use all of those from a 3.5L montero. Does anyone have any good pics from a 3.5L engine bay?

One way or another I'm gonna have to fab all the turbo plumbing. Not a huge deal, I can do all that myself. Just takes time. I'd have to find a good spot for the intercooler. Where do you 2.6T guys put the intercooler? Exhaust work is cake. I'd go with a 3" mandrel bent with no cat.

On a interesting side note, I blew up the SOHC today. Was out in the woods WOT for a while and she got hot. Tried to drive her home and was only able to make it half way. Compression #'s: 60,65,60 20, 65, 110

When I pour coolant into the radiator it pours out from all over the place haha. Oh well, time to pull the heads off I guess.


1992 VR4 12.5 @ 110 - SOLD
1993 Stealth RT/TT 11.4 @ 129 - SOLD
1991 VR4 9.2 @ 159 - Old Shop Car
1992 Stealth Twin Turbo ATX - SOLD
1990 Montero LS LWB - RIP
1995 Montero LS - RIP
1998 Montero
1992 Galant VR4 474/1000
2007 Prius
Re: Gen 1 3.5L Twin Turbo [Re: MBrannon] #961776 09/04/09 05:20 AM
Joined: Aug 2009
Posts: 81
D
dominic Offline
Getting the Wheeling Fever
im from the isuzu forum and i was just looking but why dont you do a remote mounted turbo? you could fab a compartment in the back cargo area and put it there. you get the same power numbers but it would free up lots of engine bay space. just throwing it out there.


1988 isuzu trooper LS 2.6 manual
the cool thing about owning a rare car is that someone else thinks its cool too.
Re: Gen 1 3.5L Twin Turbo [Re: dominic] #961777 09/04/09 05:25 AM
Joined: Sep 2009
Posts: 476
MBrannon Offline OP
Mudrunner
Thanks for the idea! Rear mounted turbo apps do have advantages associated with them. On a personal level though I just can't get used to the whistle back there. It just doesn't seem right smile I like to pop the hood and see the turbos looking at me.

Please keep throwing ideas at me though!


1992 VR4 12.5 @ 110 - SOLD
1993 Stealth RT/TT 11.4 @ 129 - SOLD
1991 VR4 9.2 @ 159 - Old Shop Car
1992 Stealth Twin Turbo ATX - SOLD
1990 Montero LS LWB - RIP
1995 Montero LS - RIP
1998 Montero
1992 Galant VR4 474/1000
2007 Prius
Re: Gen 1 3.5L Twin Turbo [Re: MBrannon] #961778 09/04/09 05:26 AM
Joined: Jan 2002
Posts: 6,134
TOASTY Offline
Trail Leader
*****
Here's a couple of BigRun's Pajeros the pics are small but you could e-mail them for bigger ones they speak a little english. Their twin turbo is a 3.0.

BigRun-Dunk


1999 Montero SAS'd on Kings and stuff

1998 Montero trying to get a V8 Swapped
Re: Gen 1 3.5L Twin Turbo [Re: MBrannon] #961779 09/04/09 11:02 AM
Joined: Feb 2004
Posts: 10,238
FrankR Offline
Web Wheeler
****
Quote
What Monteros had a 3.0L dohc?


Dunno - but I think there were some Montero Sport trucks with that engine. Somebody else might know.

Frank


'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum
Re: Gen 1 3.5L Twin Turbo [Re: MBrannon] #961780 09/04/09 11:35 AM
Joined: Sep 2006
Posts: 2,712
OldColt Offline
Roll Me Over
*****
Quote
What Monteros had a 3.0L dohc?


None, the G72 DOHC was never in a RWD configuration.
With the stock TT manifolds using adapters to spin the turbos 180? does not fit in a Montero. I think I can get them in a pickup though using two Front hot sides. The Montero will need a bit more work to the manifolds to relocate the turbos. I hope to get back to this next month on mine.


Cheers, Charlie
If It ain't broke, Modify it!
87 Montero turbo Converted back in Spring1989
95 Montero SR 3.8 DOHC Only one?
93 Pajero 3 door 6G75 Mivec with paddle shifted 5 speed
Then a Gen2 SR with full coil independent suspension.
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