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Forced Induction This section for the traditional Pontiac V8

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Old 06-28-09, 10:39PM   #1
69GTO
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Default Went to the track yesterday....

Hello fellow boostaholics... Sorry about how long it has taken for me to post some updates on here! I have done some major changes to the combo this past winter and gave it a try yesterday (hold on)... I swapped the cam, intake, hat, rockers, gears and some minor parts over the winter.. All of them I thought were boost friendly and still think LOL.

I changed the victor intake out for a tomahawk intake & matched it perfectly for my heads (the out of the box victor had way to big of a port for the heads I'm running and the tomahawk sits also much lower). Here's the specs for the old cam that came with the motor when I bought it Specs: 280/292@.050 & .726/.693 lift 114 L.S.
The new cam that I ordered through Butler performane is also a solid roller but much much more realistic it's a 242/236@.050 & .570/564 with 114lsa and I installed it at 110 ic. That's with a set of 1.5 ratio rockers (the old 1.65 T&D setup was to messed up by someone to be used again).
I also recently changed my 3.73/spool for a set of 3.08/posi and man what a difference! Also put a very famous Robert1320 non divided EV hat on it with a custom 2" spacer.

I have street tested all of the parts above and it's much more responsive and does act much nicer I also love the cruise rpm's of the 3.08 gears.

So first passes with the new combo.. I put it on 116oct gas to be safe on air/fuel etc. but pretty much had the street setting on. Went with M/T street radials 325/50/15 and had massive traction issues all day! Our track is all asphalt and only minor track prep is done but anyways!

First pass I went down the track pretty much spinning all 1/8 of the track and put down 11.50/135 with 2.1 60 ft. Yikes!!
2nd pass I spun the tires a bit less and went 10.99/137.
On my 3rd pass I got 1.8 60 ft. with 10.50 @ 138mph and on my last pass when I finally rpm'd the motor to 6400 each shift I got similar 60 ft. btw. but better speed through 1/8 with 110 (to a 107-108 in the earlier passes) but had to let of the gas before the 1320 mark because I blew a waterhose but coasted through the traps with 10.40/130 (that felt actually like a 142mph pass).

So... I'm pretty happy with the first outcome, I know our asphalt track likes bias ply slicks much more (for some reason) and I'd like to put my car on real soft slicks before next time and 60 in the 1.5-1.6 range not 1.8
The air fuel was about 11.5-11.8 down the track but I felt like it wanted bit more. I'd like to richen it up a bit on the topend for next time. Bost was around 15psi (the lowest I can go... damn wastegate and 3.08 gears don't mix well). Also the car might loose some weigth.. right now it's around 3650 with me in it.

But hey I got to beat a pumpgas 565 bbc Trans-Am with my traditional Poncho

Later!
Kris

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69 GTO street car. 464 Pontiac, 88 singleturbo, 210XHD Rossler trans,
3.30 gears. 850 CSU carb, Tomahawk intake, stock block, factory N-crank
and ported 197 heads. 3650 Lbs with driver. Stock suspension.

9.25 best ET with 1.42 60
151 best mph
& 5.95/119 in the 1/8th
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Old 06-28-09, 10:43PM   #2
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No bad for the first time out..not bad at all.
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Old 06-28-09, 11:46PM   #3
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Thats a great start.

Got a look at tyour build thread. really nice fab work. That car has to be a real eye turner everywhere it goes.
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Old 06-29-09, 01:13AM   #4
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Good job! With your mph there will be better timeslips.
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Old 06-29-09, 02:31AM   #5
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and everything fits under the stock hood! nice job. my kinda car
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Old 06-29-09, 02:43AM   #6
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Yep with a 138 mph 9.70 to 9.80's is just around the corner.
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Old 06-29-09, 01:07PM   #7
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Fantastic Chris. Right where it should be. Good first outing. I tried mine but I have top end power issues so I'm working on that. Keep diggin, your mph is up there, just have to get the et going. And Chris, ain't it fun?????? With that et and that mph it must be pulling like a frieght train. When I ran my last nitrous run before the turbo install, my TA ran 134 mph. The whole car just power shudders, you know what I mean if you've been there. It's like the car is just willing itself to the traps. I loved that feeling. Call me crazy!! Mark L
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Old 06-29-09, 02:02PM   #8
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Boy that cam spec looks mighty familiar to me.LOL

Seems like someones been peeking at my cams.
Funny they used to spec something totally different for pontiac turbo cars.

Told me I was nuts.
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Old 06-29-09, 02:04PM   #9
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Quote:
Originally Posted by marks73ta View Post
Fantastic Chris. Right where it should be. Good first outing. I tried mine but I have top end power issues so I'm working on that. Keep diggin, your mph is up there, just have to get the et going. And Chris, ain't it fun?????? With that et and that mph it must be pulling like a frieght train. When I ran my last nitrous run before the turbo install, my TA ran 134 mph. The whole car just power shudders, you know what I mean if you've been there. It's like the car is just willing itself to the traps. I loved that feeling. Call me crazy!! Mark L

Isnt it awsome feels like the hand of god is pushing you dwon the track doesnt it!

LIke the car is magically moving and not at all the same feeling as a N/A car!
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Old 06-29-09, 02:33PM   #10
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We pontiac types usually enjoy the torque feeling of the Pontiacs. It's usually what draws us to these motors. But usually once the initial torque hit is over the pull is less so much of a thrill. But the turbo/supercharging/nitrous top end charge changes the characteristic of the Pontiac motor to keep it pulling hard all the way thru the rpm range. I remember the dash board was vibrating, not an annoying rattle but, like I said, a power shudder. Me likey!!! Mark L
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Old 06-29-09, 03:54PM   #11
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Thanks guys! Yes the power feels awesome but you'll always want more. LOL
As for the cam.. I spent some time on the phone with the Butlers and told them roughly what I wanted for cam specs and they gave me a couple of grinds and this one was pretty close to my target so I just went for it. Yes, Jeff along with others on this board helped me pick this cam.

I also have one question... I blew my pass. header gasket (I think some of the bolts might have come loose..Are you guys just using the high temp rtv for sealing ).
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69 GTO street car. 464 Pontiac, 88 singleturbo, 210XHD Rossler trans,
3.30 gears. 850 CSU carb, Tomahawk intake, stock block, factory N-crank
and ported 197 heads. 3650 Lbs with driver. Stock suspension.

9.25 best ET with 1.42 60
151 best mph
& 5.95/119 in the 1/8th
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Old 06-29-09, 05:50PM   #12
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Sorry Kris for misspelling your name. I tried paper gaskets and metal gaskets. They just kept leaking. Many have told me to just use the hi temp RTV. Of course I'm not going to believe anyone else so I just kept blowing gaskets and cursing Pontiac. So I tried the RTV only trick, good and thick, let it set up over night before assembly, put a dab on at assembly and so far it has held. BUT!!! I have very little time on the RTV so don't know how long it will last. But it held nice up to having the TA down for some upgrades. I wil do the pass. side as soon as I'm convinced the drivers side has held up. It involves complete disassembly of the turbo hot side system. So we'll see. Mark L
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Old 06-29-09, 09:52PM   #13
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I just lost my freakin post WTF!

LOL

I guess I'll type it again.

Just use RTV, light coat, sits over night, Then add a light coat in the morning and bolt it up. Run the engine let cool and retorque.

Should seal like crazy. sometimes I have to use a rubber mallet to get them off.

On a side note, when ever you get a radiator hose blowing off check for compression in the system. either start the car without the radiator cap and check for bubbles, or drop a dye in there that changes with contamination.
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Old 06-29-09, 11:55PM   #14
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Yeah I need to check what's going on.... But the hose that blew was old so I hope it's nothing major! Too bad about the exhaust leak because it's a PITA to get to it..
I'll do the rtv method this time.

PS. Here's a pic from a show that I attended to just the other day, had the street rims on it.

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69 GTO street car. 464 Pontiac, 88 singleturbo, 210XHD Rossler trans,
3.30 gears. 850 CSU carb, Tomahawk intake, stock block, factory N-crank
and ported 197 heads. 3650 Lbs with driver. Stock suspension.

9.25 best ET with 1.42 60
151 best mph
& 5.95/119 in the 1/8th
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Old 06-30-09, 01:00AM   #15
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how big are those toque thrust's?

Look like 18's I am looking at 17's for my vert TTII's
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