Home | Register | Login | Contact Us

 
Auto Math
Classifieds
Forum
Gallery
Games
Garage
Tech Articles
Utilites
 
FAQFAQ    SearchSearch    RegisterRegister    Log inLog in    Log in to check your private messagesLog in to check your private messages    Forum Subscriptions1/4 Mile Table 

LSx 68Camaro

 
Post new topic   Reply to topic    SMOKEmUP.com Forum Index -> Chevy - Camaro
View previous topic :: View next topic  
Author Message
Skunkworkx
Member


Joined: 02 Sep 2007
Posts: 352
Location: Harford Co. Maryland
10318.16 points


1968 Chevrolet Camaro

PostPosted: Sat Oct 26, 2013 9:09 pm    Post subject: LSx 68Camaro Reply with quote

Sorry, I been busy and not around...got to make a pass a ways back and oiled track down. Seems it built up pressure and blew out the dip stick spraying oil everywhere. I think its fixed.

Anywho....I finally got back to the track today Very Happy
got 4 passes in and some more tuning to do....




_________________
68 Camaro LSx
AKA:RedЯum
Back to top
View user's profile Send private message
clay
Moderator


Joined: 24 Nov 2002
Posts: 3209
Location: South Carolina
318129.23 points


1972 Chevrolet Nova

PostPosted: Sun Oct 27, 2013 8:07 pm    Post subject: Reply with quote

For basically the first time out I'm guessing on a street car - very impressive. Clay
_________________
I have done so much with so little for so long, I can now do anything with nothing.
Back to top
View user's profile Send private message
Paul P
Member


Joined: 15 Aug 2002
Posts: 2404
Location: Townsend, Mass.
81616.60 points


1971 Chevrolet Chevelle

PostPosted: Mon Oct 28, 2013 3:33 pm    Post subject: Reply with quote

Nice times! Great to see someone made it. I was just able to jack the fuel pressure up to 25psi and set the basics in the garage but did not have a chance to drive the car.
_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
Back to top
View user's profile Send private message
Skunkworkx
Member


Joined: 02 Sep 2007
Posts: 352
Location: Harford Co. Maryland
10318.16 points


1968 Chevrolet Camaro

PostPosted: Mon Oct 28, 2013 10:13 pm    Post subject: Reply with quote

Looking at a 3" exhaust system or two now....may be a bottle neck ?

Anyone in the 10's with a 2.5" exhaust system ??? Very Happy

_________________
68 Camaro LSx
AKA:RedЯum
Back to top
View user's profile Send private message
Paul P
Member


Joined: 15 Aug 2002
Posts: 2404
Location: Townsend, Mass.
81616.60 points


1971 Chevrolet Chevelle

PostPosted: Tue Oct 29, 2013 11:24 am    Post subject: Reply with quote

My old 3" did get me into the high 10s. 3.5" is now on there as 3" technically is only good for about 550HP then it becomes a restriction. This of course doesn't mean you can't use it with more power than that is just might be taking a little away above that point in power.
_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
Back to top
View user's profile Send private message
clay
Moderator


Joined: 24 Nov 2002
Posts: 3209
Location: South Carolina
318129.23 points


1972 Chevrolet Nova

PostPosted: Tue Oct 29, 2013 7:49 pm    Post subject: Reply with quote

Quote:
Anyone in the 10's with a 2.5" exhaust system ???


I ran 10.15 with a 2 1/2" system and it wasn't a restriction at that level (Procharger assited though). I checked this in two different ways. One I did end up dropping it at the track with the passenger seat and rear seat which was a total of 110 lbs. E.t improved 0.1 which accounts for the weight reduction and not really any additional power. If there would have been more power I would think it would drop more than 0.1. Second I put a pressure gauge in the exhaust to measure any back pressure. I can't remember exaclty how much was there but it seems like it was around 2 p.s.i. and seems like I read anything 1 1/2 or lower wasn't costing any power. If I was you I would put a gauge in your system and do the same before you spend the money. I've always wondered if part of the gain seen in a 3" system (or one that matches collector diameter) is it acts more like a very long collector extension and improves torque that way more than by back pressure reduction. Clay

_________________
I have done so much with so little for so long, I can now do anything with nothing.
Back to top
View user's profile Send private message
Skunkworkx
Member


Joined: 02 Sep 2007
Posts: 352
Location: Harford Co. Maryland
10318.16 points


1968 Chevrolet Camaro

PostPosted: Tue Oct 29, 2013 9:41 pm    Post subject: Reply with quote

HHhhmmmm.... pressure gauge sounds like a great idea. Thanks Very Happy
_________________
68 Camaro LSx
AKA:RedЯum
Back to top
View user's profile Send private message
Paul P
Member


Joined: 15 Aug 2002
Posts: 2404
Location: Townsend, Mass.
81616.60 points


1971 Chevrolet Chevelle

PostPosted: Wed Oct 30, 2013 11:22 am    Post subject: Reply with quote

clay wrote:


I've always wondered if part of the gain seen in a 3" system (or one that matches collector diameter) is it acts more like a very long collector extension and improves torque that way more than by back pressure reduction. Clay


I can attest to that with the new 3.5" system that matches the 3.5" collector on my headers. Damn... Lots of torque.

_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
Back to top
View user's profile Send private message
Skunkworkx
Member


Joined: 02 Sep 2007
Posts: 352
Location: Harford Co. Maryland
10318.16 points


1968 Chevrolet Camaro

PostPosted: Fri Nov 01, 2013 3:33 pm    Post subject: Reply with quote

Only problem with just putting on extensions would be the 4-bolt header flange.

1 7/8" Dynatech swap headers.

_________________
68 Camaro LSx
AKA:RedЯum
Back to top
View user's profile Send private message
Paul P
Member


Joined: 15 Aug 2002
Posts: 2404
Location: Townsend, Mass.
81616.60 points


1971 Chevrolet Chevelle

PostPosted: Fri Nov 01, 2013 10:47 pm    Post subject: Reply with quote

4 bolt collectors? Shocked
_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
Back to top
View user's profile Send private message
Skunkworkx
Member


Joined: 02 Sep 2007
Posts: 352
Location: Harford Co. Maryland
10318.16 points


1968 Chevrolet Camaro

PostPosted: Sat Nov 02, 2013 4:04 pm    Post subject: Reply with quote

These...square flange.


_________________
68 Camaro LSx
AKA:RedЯum
Back to top
View user's profile Send private message
Paul P
Member


Joined: 15 Aug 2002
Posts: 2404
Location: Townsend, Mass.
81616.60 points


1971 Chevrolet Chevelle

PostPosted: Sat Nov 02, 2013 11:20 pm    Post subject: Reply with quote

All I can say is why? I guess you could buy some 4 bolt flanges and weld them to any system you wanted to bolt them too. Summit must sell the 4 bolt flanges.
_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
Back to top
View user's profile Send private message
Skunkworkx
Member


Joined: 02 Sep 2007
Posts: 352
Location: Harford Co. Maryland
10318.16 points


1968 Chevrolet Camaro

PostPosted: Sun Nov 03, 2013 10:45 am    Post subject: Reply with quote

To tell you the truth... I really like them. They take a stock style doughnut gasket and are leak free. Beats the hell outta the cheesy paper gaskets.
I can buy different reducers for different size pipes....just not at my local auto parts places Sad
I guess they figured if you use their stuff, you'll have to come back for parts Evil or Very Mad

_________________
68 Camaro LSx
AKA:RedЯum
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    SMOKEmUP.com Forum Index -> Chevy - Camaro All times are GMT - 5 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You can attach files in this forum
You can download files in this forum
Home | Contact Us | Automath | Cam Files | Dyno Search | Forum | Garage | Picture Gallery | Reaction Timer

Copyright 1997-2016 SMOKEmUP.com All rights reserved.
Advertising Info     Disclaimer     Privacy Policy