PONTIAC ZONE TECH FORUMS
 

Go Back   PONTIAC ZONE TECH FORUMS >
Engine Tech
> " TURBO BUILDS "
User Name
Password

" TURBO BUILDS " Post your Turbo build-Up or any that you have in process

sponser links

Reply
 
Thread Tools
Old 08-23-16, 01:59PM   #226
turbo69BIRD
Moderator
 
turbo69BIRD's Avatar
 
Join Date: Feb 2005
Location: simsbury CT
Posts: 5,717
Default

I've got a glass nose, glass does and a glass trunk lid and my car is still 3260 w/o driver so that weight really isn't far off rom what it should be w steel. Turbo chit isn't light but luckily the turbo gods made them like being loaded hard so it works out in the long run. ��
turbo69BIRD is offline   Reply With Quote
Old 08-29-16, 12:34AM   #227
7D9TA
Registered User
 
7D9TA's Avatar
 
Join Date: Jan 2006
Location: Round Rock, TX
Posts: 211
Default

Made it back to the track Friday night. Got the car to hook and go straight on the last pass. 6.80@99 with a 1.49 60 ft. 6 lbs boost on the brake 9 lbs off. 1/8th mile track.
__________________
79 Trans Am
476 IAII, 88mm Garrett turbo. 4000 lb race weight.
Best pass so far 9.65 @ 140. 1.41 60 ft.
4 lbs boost on t-brake. 14 lbs going down the track.
7D9TA is offline   Reply With Quote
Old 08-29-16, 10:02AM   #228
JSPONT
Registered User
 
JSPONT's Avatar
 
Join Date: Feb 2014
Posts: 1,375
Default

Nice!!
JSPONT is offline   Reply With Quote
Old 08-29-16, 06:24PM   #229
7D9TA
Registered User
 
7D9TA's Avatar
 
Join Date: Jan 2006
Location: Round Rock, TX
Posts: 211
Default

Quote:
Originally Posted by turbo69BIRD View Post
I've got a glass nose, glass does and a glass trunk lid and my car is still 3260 w/o driver so that weight really isn't far off rom what it should be w steel. Turbo chit isn't light but luckily the turbo gods made them like being loaded hard so it works out in the long run. ��
I agree about the turbo loving the load but getting almost 2 tons of mass moving is hell on the tires and suspension. If I can get this car to 60 ft in the 1.3X I will be one happy SOB.

Remember. Its just a little pump gas street car.
__________________
79 Trans Am
476 IAII, 88mm Garrett turbo. 4000 lb race weight.
Best pass so far 9.65 @ 140. 1.41 60 ft.
4 lbs boost on t-brake. 14 lbs going down the track.
7D9TA is offline   Reply With Quote
Old 08-30-16, 07:30PM   #230
DocsTA
Turbo addict
 
DocsTA's Avatar
 
Join Date: Feb 2009
Location: USA
Posts: 1,146
Default

Quote:
Originally Posted by 7D9TA View Post
I agree about the turbo loving the load but getting almost 2 tons of mass moving is hell on the tires and suspension. If I can get this car to 60 ft in the 1.3X I will be one happy SOB.

Remember. Its just a little pump gas street car.
My TA Always hooked well and straight with shock mods. My problem was the weight transfer on launch. Really need a good set of shocks out front for transfer to make it work.

Went with the Caltrac, split monos and an ARB in back now, so I'll see how she squats and hooks soon.
__________________




1979 Trans-Am Turbo Charged 535 IA2,
CV 1 heads with convertible exhaust option. 305cc, flowing 405cfm with mild intake port clean up


1979 Silver Anniversary 4 speed, numbers matching.
DocsTA is offline   Reply With Quote
Old 09-02-16, 12:58AM   #231
7D9TA
Registered User
 
7D9TA's Avatar
 
Join Date: Jan 2006
Location: Round Rock, TX
Posts: 211
Default

Quote:
Originally Posted by DocsTA View Post
My TA Always hooked well and straight with shock mods. My problem was the weight transfer on launch. Really need a good set of shocks out front for transfer to make it work.

Went with the Caltrac, split monos and an ARB in back now, so I'll see how she squats and hooks soon.
I had great luck with the split monos and Caltracs. I had a lot less power than you do. Let us know how to goes.
__________________
79 Trans Am
476 IAII, 88mm Garrett turbo. 4000 lb race weight.
Best pass so far 9.65 @ 140. 1.41 60 ft.
4 lbs boost on t-brake. 14 lbs going down the track.
7D9TA is offline   Reply With Quote
Old 09-08-16, 11:13AM   #232
meanone
Registered User
 
meanone's Avatar
 
Join Date: Feb 2008
Location: Florence,Ky
Posts: 99
Default

7D9, have you brought your car up on the transbrake to see where your stall speed is? Wich converter do you have in there?
meanone is offline   Reply With Quote
Old 09-12-16, 05:24PM   #233
7D9TA
Registered User
 
7D9TA's Avatar
 
Join Date: Jan 2006
Location: Round Rock, TX
Posts: 211
Default

Quote:
Originally Posted by meanone View Post
7D9, have you brought your car up on the transbrake to see where your stall speed is? Wich converter do you have in there?
I've used the transbrake several times. I'm using rev limiter to set launch RPM. I've set it as high as 4500 RPM. Racepak shows that in 3rd gear at 5200 rpm my driveshaft RPM is 4900. Converter is fairly tight. From idle it only flashes to about 2200 at launch.

I'm running a PTC converter. Don't remember if it's 9.5 or 10 inch.
__________________
79 Trans Am
476 IAII, 88mm Garrett turbo. 4000 lb race weight.
Best pass so far 9.65 @ 140. 1.41 60 ft.
4 lbs boost on t-brake. 14 lbs going down the track.
7D9TA is offline   Reply With Quote
Old 09-12-16, 09:50PM   #234
meanone
Registered User
 
meanone's Avatar
 
Join Date: Feb 2008
Location: Florence,Ky
Posts: 99
Default

I wanted to ask you if you've ever engaged the transbrake and just floored it to see where it goes on the 9psi or so that you're on now. My car definitely needs a converter. It's the next thing that I'm doing. My converter flashed to 4,600 rpm on the engine. When I tested it the other day it went to 4,600 rpm as soon as I floored it, then as soon as the boost came on it shot right past 6,000rpm. The reason that I brought this up is that I was reading your thread and wondering why your mph stayed the same between 6psi and 9psi.
meanone is offline   Reply With Quote
Old 09-13-16, 10:18AM   #235
7D9TA
Registered User
 
7D9TA's Avatar
 
Join Date: Jan 2006
Location: Round Rock, TX
Posts: 211
Default

Quote:
Originally Posted by meanone View Post
I wanted to ask you if you've ever engaged the transbrake and just floored it to see where it goes on the 9psi or so that you're on now. My car definitely needs a converter. It's the next thing that I'm doing. My converter flashed to 4,600 rpm on the engine. When I tested it the other day it went to 4,600 rpm as soon as I floored it, then as soon as the boost came on it shot right past 6,000rpm. The reason that I brought this up is that I was reading your thread and wondering why your mph stayed the same between 6psi and 9psi.
Wow. That is loose.

I think my lack of change in MPH is just tuning. I am taking 16 deg of timing out at 10 lbs boost. Next track trip will be more about timing changes then boost.
__________________
79 Trans Am
476 IAII, 88mm Garrett turbo. 4000 lb race weight.
Best pass so far 9.65 @ 140. 1.41 60 ft.
4 lbs boost on t-brake. 14 lbs going down the track.
7D9TA is offline   Reply With Quote
Old 09-13-16, 09:17PM   #236
meanone
Registered User
 
meanone's Avatar
 
Join Date: Feb 2008
Location: Florence,Ky
Posts: 99
Default

Yeah, I'd say you'll pick up pretty good next time. Get it back to the track soon! I've got to wait until I get a converter myself. Bummed.
meanone is offline   Reply With Quote
Old 09-19-16, 02:05PM   #237
7D9TA
Registered User
 
7D9TA's Avatar
 
Join Date: Jan 2006
Location: Round Rock, TX
Posts: 211
Default

Made it back to the track Friday. I put the heaviest spring I have in the wastegate and went up 2 jet sizes all around. Then like an idiot I forgot to take my jet assortment to the track with me. Car launched great. 3200 RPM on the brake, 1.51 60 ft. But as soon as the boost came up to 13 lbs I heard detonation so I lifted. Racepak showed my AFR was in the 13:1- 13.5:1 area. With no jets or springs to swap back I called it a night before I hurt the motor.

At least I know the suspension changes made for a repeatable 60 ft.

I have a few changes up my sleeve. I'll update with some detail as soon as we finalize the plan.
__________________
79 Trans Am
476 IAII, 88mm Garrett turbo. 4000 lb race weight.
Best pass so far 9.65 @ 140. 1.41 60 ft.
4 lbs boost on t-brake. 14 lbs going down the track.
7D9TA is offline   Reply With Quote
Old 09-20-16, 12:54PM   #238
meanone
Registered User
 
meanone's Avatar
 
Join Date: Feb 2008
Location: Florence,Ky
Posts: 99
Default

Whoa! How'd it get so lean?
meanone is offline   Reply With Quote
Old 09-22-16, 12:26PM   #239
7D9TA
Registered User
 
7D9TA's Avatar
 
Join Date: Jan 2006
Location: Round Rock, TX
Posts: 211
Default

Quote:
Originally Posted by meanone View Post
Whoa! How'd it get so lean?
I put heavier springs in the wastegate. More boost = more air. But not enough additional fuel.

Getting ready for the next upgrade.
Attached Thumbnails
Click image for larger version

Name:	XFI.jpg
Views:	60
Size:	173.3 KB
ID:	28763   Click image for larger version

Name:	XFI2.jpg
Views:	64
Size:	219.0 KB
ID:	28764  
__________________
79 Trans Am
476 IAII, 88mm Garrett turbo. 4000 lb race weight.
Best pass so far 9.65 @ 140. 1.41 60 ft.
4 lbs boost on t-brake. 14 lbs going down the track.
7D9TA is offline   Reply With Quote
Old 09-22-16, 03:33PM   #240
meanone
Registered User
 
meanone's Avatar
 
Join Date: Feb 2008
Location: Florence,Ky
Posts: 99
Default

Yeah, but you only added three psi. My afr doesn't hardly change with that boost increase. Anyway, are the FAST systems self learning like the Holley?
meanone is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 2 (0 members and 2 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
My 301 Turbo Build Ondatrack " TURBO BUILDS " 28 01-23-15 02:38PM
turbo build micah7996 " TURBO BUILDS " 125 07-19-11 06:18PM
Help With 412 Turbo Build quickz Forced Induction 24 06-22-11 05:27PM
Im bored, so I want to do another turbo build DocsTA " TURBO BUILDS " 68 01-06-10 01:04AM
If you wanted to build a turbo? Bankbook Forced Induction 63 01-22-09 12:38AM


All times are GMT -3. The time now is 09:29AM.

Featured Ads
Ken's Speed & Machine
Mayhem Turbocharging

Carter Cryogenics.  What can we freeze for you?

Pacific Performance Racing

Central Virginia Machine Service.  Home of the Injun Engine!

All Pontiac Engine Kits

Larry's Auto Machine.  Full serivce auto, marine machine shop, domestic and foreign.

Powered by vBulletin® Version 3.6.8
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
2001 - 2007 PontiacZone.com
Page generated in 0.17607 seconds with 44 queries