Project Zero G Forums ~ View topic - 4G63 FC-Anyone here?

Found this while doing a search on some stuff for this 1990 Colt GT I'm picking up tomorrow. Looks pretty nice. Does it belong to anyone here?

http://www.doitbig.org/coltboostin/pics/4GX7/done/

First of all, why twin turbos? Which turbos is he using? And when it is actually finished, what rpm to they start building boost at??

Whoever did it.. its awesome. The tilted engine looks great in there.

Addict Joined: 08 Feb 2007 Posts: 83

interesting bov placement too aswell

i have always been led to believe the close to the throttlebody the better

no only is his as far away as possible but he is running a seperate one for each turbo?

Yeah, the engine tilt will probably be an issue. The twin BOV and placement sucks as well. I just thought it was kinda cool and thought I'd share. As soon as I get a few more parts, I'll have a 4G63T swapped Colt GT. Very Happy

Anyone here from Colorado and have a 6-bolt FWD flywheel?

Too Much Time on His Hands Joined: 28 Dec 2004 Posts: 490

thats JP, youguys can only WISH you could be that cool Laughing

you can talk your theorys and shit but he built this car and got it running in a fraction of the time any of you have. i dont mean to come off like a dick but JP knows what hes doing lol. he had a 700 whp fwd colt a couple of years ago that got totaled. Crying or Very sad

there is no problem with the oiling, that engine came from the factory with that tilt, its set up axactly the way it should be

Too Much Time on His Hands Joined: 28 Dec 2004 Posts: 490

Mr. Fancy Pants Joined: 29 Oct 2004 Posts: 858

man that car is awesome. The fc shoulda came with a mitsubishi engine from the factory Laughing

Addict Joined: 10 Sep 2007 Posts: 149

Hey guys- yeah thats my pile.

TO answer a few Q's-

The motor's lean is just how the bellhousing sets it. I had to fab an oil pan, and oil pickup, and oil filter housing-and in the 1000+ miles I have put on the car, I have had zero oiling issues.

The TT was just because really, I honestly did not expect it to work that well, but I get these turbos for 15% of what my GT42 non BB cost me, so it was worth a shot!

I see 20psi at 4800rpm, and 30+ at 5200rpm. This is a full 1k faster than the GT42 on my Colt came into boost, and is very responsive on the street.

To save time-I will copy and paste this from another forum-

Drove up in the rain-made it on the Dyno around 3am.

First pull, no changes-20psi (creep to 22 by redline) 450whp/400ft lbs. Full boost by 4.8k

http://www.doitbig.org/coltboostin/pics/4GX7/done/dynostockhead/rx7dynostockhead%20066.mpg (right click-save as please)

AFR's were a bit lean for me on pump gas 12.2-12.5, so I turned to fuel up. Made 468/413 next pull with 11.2-11.5 AFR's.

Go to 110 leaded "pump" gas, play with restrictors for a few pulls-get it to spike to 30ish psi, and hold just under 30ps to redline (only 7k, since my stock Hyundi head/cams own me)

564whp 490ft lbs trq. With nice and thick 11.0-11.2 AFR's. It was 4am, so we went to stake and shake. I dont see the need in trying to get the tune "perfect" with all the junkyard parts on the car.

Chart
http://www.doitbig.org/coltboostin/pics/4GX7/done/dynostockhead/IMG.jpg

*note-boost reference was taken pre-intercooler

Pics
http://www.doitbig.org/coltboostin/pics/4GX7/done/dynostockhead/

With how responsive the system is, I would have to say the Twin turbo setup works, and I think I will be refining it over winter. Both turbo's still feel mint, and both compressors are 100% perfect, even with well over 1000miles of flogging with my "ghetto" ram air induction.

Cliff notes on set up

4G64 w junkyard Hyundai DOHC head
Stock Rusty Hyundai cams
JMF RWD intake/w Q45
Twin China 50 trims
Mild welded "BoBo" manifold
Single used Tial 38mm
Fidanza Flywheel
ACT 2600/6 puck clutch
JP Fab whatever is laying around intercooler plumbing
"look what I found" DSM 255lhp fuel pump
1600cc injectors
DSM Link
GM MAF-T
China intercooler
2.5x2 to 4inch exhaust (1/2 of which made from Cummins stock exhaust)
Jp Fab Alt relocation
"Peek-a-boo" Ram air induction
Junk ass Cobra wheels with BFG's

I will toss a good head on it over winter, with Cams I already have for the car. I do expect to make anywhere from 100-200more whp more, since I will rev it to 8k, and the power will climb all the way to that point. As long as ti does not run out of turbo, or the lack of good exhaust flow does not choke it up, it seems like it should beat the Colt's 708whp.

The kicker-you can duplicate this fro $4475. Although I did not spend that much, thanks to always scavenging for cheap used parts, and my Grandfathered sponsors JMF and DSmlink, if you have a harbor freight mig welded and a little bit of time, you could have quite the FUZION for less than 5k total investment.

Thanks to Jim at JMF
http://www.jmfabrications.com/

And Tom at DSMlink
http://server.dsmlink.com//

For your amazing products!

More videos/timeslips/40 rolls to come.....

_________________
708whp Colt
10.5@148mph-the EX Daily Driver.

Addict Joined: 10 Sep 2007 Posts: 149

Hey-and the Colt has only been gone a year now!

Some of the 100's of videos of that old goat.

With the 60-1 (500whp)
http://videos.streetfire.net/video/B208C0B2-7154-4356-9BB6-1F5E1A6C03F5.htm

With the GT42@29psi

http://videos.streetfire.net/hottestvideos/14/e3da15e9-fc26-408c-a714-ad318845ffb1.htm

GT42 on gate spring 14psi
http://videos.streetfire.net/video/71f58233-dfd8-4770-b312-983c01849fac.htm

You know, I still miss that little POS.

Addict Joined: 01 Dec 2006 Posts: 182 Location: Ventura,CA

that thing is awesome man. good job. what's next other than the built head?

Addict Joined: 08 Feb 2007 Posts: 83

have you got any pics of your water line from the rear of the head?
possibly with the inlet off would b great if you happened to have any (which i doubt you do but worth a shot)
im goimng to run mine very similar to urs so would love to see some pics

cheers mate

Addict Joined: 10 Sep 2007 Posts: 149

Addict Joined: 10 Sep 2007 Posts: 149

Addict Joined: 10 Sep 2007 Posts: 149

http://www.doitbig.org/coltboostin/pics/4GX7/littlemods/waterneck/

I know some people wanted pics of the water neck-so here they are. Dont make too much fun of it. Laughing

Are you running a t-stat JP? I cannot tell in the last pic.

Addict Joined: 10 Sep 2007 Posts: 149

No, just a restrictor ( a big washer) in the radiator hose just before the cap. It acts just like it has a T-stat in it, and wanted to overheat quickly while in boost without it. For those wondering, I grabbed that cap assemble for an 86 MR2

Addict Joined: 10 Sep 2007 Posts: 149

Just FYI- its shifts now. Smile

1/4 mile 4th gear burnouts are cool. Cool

See you in 08

Addict Joined: 03 Feb 2005 Posts: 272

what was the problem?

Addict Joined: 10 Sep 2007 Posts: 149

No comment for now... Smile

Something simple though..

Too Much Time on His Hands Joined: 06 Jun 2007 Posts: 353

Did you split the exhaust, say 1&4 and 2&3 or just make a split manifold to feed both turbos with all 4 ports?

Looks VERY interesting? I seem to have missed this thread somehow. Confused

I do have a couple of older Mitsu turbos HHMMmmmm?

Too Much Time on His Hands Joined: 06 Jun 2007 Posts: 353

Sorry, I didn't think to look for the next pages..

I did see the picks. Thanks.

Addict Joined: 10 Sep 2007 Posts: 149

Would anyone here be interested in purchasing this current turbo set up? I may be looking to go single.
The twins work well, but I dont think they will make 700whp for me, not unless I take them to 35+psi..and I dont like big boost.

Addict Joined: 16 Feb 2006 Posts: 126 Location: Elkhart IN

I think i saw that RX-7 at the Shootout.

Knowlege Seeker Joined: 06 May 2008 Posts: 5

hey just wondering what you used for motor mounts im thinking of doing this to my 89 convertible

Addict Joined: 10 Sep 2007 Posts: 149

Everything in the car had to be custom fabricated.

Hell-I even made custom oil sending unit!

Knowlege Seeker Joined: 06 May 2008 Posts: 5

thats cool where are you located

Addict Joined: 10 Sep 2007 Posts: 149

Knowlege Seeker Joined: 06 May 2008 Posts: 5

i was hoping somewhere close to mn so i could see it in person there is a 4g64 3rd gen rx7 here that a performance shop built i might have to go look at it

http://www.mnmazda.com/forum/showthread.php?t=694

Addict Joined: 10 Sep 2007 Posts: 149

Knowlege Seeker Joined: 06 May 2008 Posts: 5

for sure is that the one in august

Addict Joined: 10 Sep 2007 Posts: 149

Knowlege Seeker Joined: 06 May 2008 Posts: 5

ya ill try to get off work for that then ill look into a place to stay but it sounds fun to me

Addict Joined: 10 Sep 2007 Posts: 149

Knowlege Seeker Joined: 15 Sep 2008 Posts: 2

First off let me say that your conversion is sick and has inspired me to do the same to my 90' Turbo II.

I was wondering what kind of car the 4G64 came from and what year it was. It seems from the writeups that only a select few vehicles like the Mighty Max pickup and Montero carry the wideblock motor that we need for the Rx-7 tranny to line up. I don't have to tell you how hard it is to find engines from these vehicles in the particular years specified. Also how did you mate the Rx-7 tranny to the 4G64? did you use the B2600 bellhousing as suggested in the Project Zero G tutorials?

Finally are the block and head from the same car or did you combine them from different ones?

Any help you could offer would be greatly appreciated. Thanks in advance

Addict Joined: 10 Sep 2007 Posts: 149

Addict Joined: 10 Sep 2007 Posts: 149

Here are some pics of it at the shootout.

Knowlege Seeker Joined: 15 Sep 2008 Posts: 2

Thanks for the quick reply dude.

Needless to say I wait with bated breath for 'the post'. Illuminate us with your wisdom on this topic. Lay it all on us newbies. We can handle it.... really
(unless we explode from excitement... Lol).

Knowlege Seeker Joined: 03 Sep 2007 Posts: 46

I'm no master welder, but the welds in this pic...

Also, don't you need an alternator to have a belt to work? Laughing

In any case, it's much farther along than mine.

Did you keep the balance shafts in?

Addict Joined: 10 Sep 2007 Posts: 149

Hey, it was an experiment to see if ti would work- no point spending money, and time making something pretty if I was not going to keep it! Last year on the twins it went 11.6@128 on low boost, and pump gas. It had a 70mm, and a 50 trim on it since. I have pulled the motor and trans in favor of a 6 speed for nest year, I need to get back over 200+mph.