1970 GTO Version 2.0

[cdoggy81]

WOW, didn't know you had the stock cam in there. You can go low 12 easy if you wanted to go with a small A.M. cam.

See you at PRI

[andrewb70]

WOW, didn't know you had the stock cam in there. You can go low 12 easy if you wanted to go with a small A.M. cam.

See you at PRI

It is a stock LS7 cam. I have plenty of power to go 11.9x. It is a matter of more traction not more power. If I add more power by getting a bigger cam, my ET is likely to stay the same or go down, since it will be harder to launch the car.

Andrew

[cdoggy81]

Didn't know you went with the LS7 cam.

[jv982]

Today I got the exhaust buttoned up. A new Dr.Gas x-pipe was installed and connected the headers to the mufflers. The car is very quiet. Almost too quiet. I has a nice deep tone. It is a hair louder than a new ZO6 Corvette.
Andrew

I searched this thread but did not find any specifics on the rest of your exhaust besides the x-pipe.

There seem to be a bunch of questions in the exhaust section about quiet exhaust systems, and you seem to have figured it out. What kind of mufflers and headers are you running?

[andrewb70]

I searched this thread but did not find any specifics on the rest of your exhaust besides the x-pipe.

There seem to be a bunch of questions in the exhaust section about quiet exhaust systems, and you seem to have figured it out. What kind of mufflers and headers are you running?

The headers are from Edelbrock. They ar ethe new LSx swap headers for 68-72 A-bodies. They have a 3" collector that goes to a dr.gas 3" X-pipe. The mufflers are from a company that I do not believe is in business anymore. It was called Straightline Performance. They are very big, similar to Dynomax Ultra Flows. From the mufflers I have 3" tailpipes. So the system is 3" all the way from the collectors to the exhust tips.

Andrew

[gearbanger]

Andrew, did you ever check the bump steer on the new ATS spindles like you did the B-body stuff. I have pretty much the same setup you had, and I am thinking of doing pretty much the same conversion. Just wondering what the final results were.

[andrewb70]

Andrew, did you ever check the bump steer on the new ATS spindles like you did the B-body stuff. I have pretty much the same setup you had, and I am thinking of doing pretty much the same conversion. Just wondering what the final results were.

I had all the intention in the world to document the bump steer with the ATS spindles, but I just ran out of time. My new brakes came and I put them on the car, then the o-ring in the TOB went out a week before RTTH. I was running out of time and checking the bump steer fell off the "to do" list. I can tell you that I definitely notice a difference when driving the car. I've gone over big bumps with just one side of the car and it tracks straight and true. That was not the case with the B-body spindles.

Andrew

[gearbanger]

Yes, you definitely can notice bump steer with the B-body spindles. I was just wondering actually how much improvement you get. I am not a corner carver, so I am not real motivated to spend all the money to make it just perfect. Oddly enough, I am more interested in doing it so that when I launch at the drags I have less toe in when the front end comes up. Crazy, I know.

[andrewb70]

Yes, you definitely can notice bump steer with the B-body spindles. I was just wondering actually how much improvement you get. I am not a corner carver, so I am not real motivated to spend all the money to make it just perfect. Oddly enough, I am more interested in doing it so that when I launch at the drags I have less toe in when the front end comes up. Crazy, I know.

For steady state cornering the b-body spindles do the job. They are taller and give a better camber curve. However, if you are to hit a bump during a hard corner, the bump steer upsets the car, and that can be dangerous. I would definitely go with the ATS spindles even for drag racing. For the simple reason that you can get excellent, modern brakes, and probably a reduction in unsprung weight. I am not sure about the toe issue that you mention.

Andrew

[gearbanger]

When you launch and both front wheel droop, the tie rods pull in and the wheels toe in creating more drag. Most drag racers set their alignment with the front end jacked up a few inches to compensate. I don't really want to do that because mine is 99% street driven, but it would be cool to fix it with better technology.

[Steve68]

Andrew, I have a set of the "not made" mufflers Rhino Performer RPM mufflers, a lot like Magna Flows, straight thru, had them on a test Nova, quiet, but louder when on the pedal,

[KevMc]

Is that your GTO in the 05 Holley catalog?

[andrewb70]

Is that your GTO in the 05 Holley catalog?

Yes Sir.

I worked at Holley for a while.

In case some of you were wondering where the pictures went, it is all fixed. The issue was tied in with our forum troubles from last week.

Andrew

[DIK069]

Nice write up Andrew. Learnt a lot.

Would you use the same size clutch master cylinder again ?

[andrewb70]

Nice write up Andrew. Learnt a lot.

Would you use the same size clutch master cylinder again ?

I think with this particular setup, given the rather long stroke of this MC, even a slightly smaller .625" bore MC can be used. However the current .700" seems to work very well when the stroke is reduced, as I did, or if a pedal stop is fabricated.

Andrew

[andrewb70]

Here is a video clip that was made by Brian Finch. Thanks Brian!

RTTH Video

Please right click and save to your local drive.

Andrew

[oestek]

Here's the feature on Andrew's GTO from the RTTH IV event... this video features an interview with the man, plus drag and auto-x footage. Killer car, man!

http://v8tvshow.com/content/view/724/40/

[tom_a]

Here's the feature on Andrew's GTO from the RTTH IV event... this video features an interview with the man, plus drag and auto-x footage. Killer car, man!

http://v8tvshow.com/content/view/724/40/

Very nice work Kevin! Very cool that you do these events etc.
Is the complete video for sale now?

[andrewb70]

Here's the feature on Andrew's GTO from the RTTH IV event... this video features an interview with the man, plus drag and auto-x footage. Killer car, man!

http://v8tvshow.com/content/view/724/40/

Kevin,

I really want to thank you for putting together such a great segment. Thank you!

But next time please only use one camera. They say the camera ads about 10 pounds, you must have been using 5. I have my new years resolution!

Andrew

[oestek]

Very nice work Kevin! Very cool that you do these events etc.
Is the complete video for sale now?

Thanks Tom,

Yes, the video is available and shipping now. 2 versions, in fact... one "production" version that this came from, and a raw cut of all the autocross runs back to back, like 1.5 hours of footage. The link to get the RTTH vid is under the video player window in Andrew's video on our site. We still have to add the auto-x video to the store, but email me if you're interested.

- Kevin