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Old 11-29-14, 12:12AM   #61
JSPONT
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Looks good, you will be driving that beast before you know it!
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Old 11-29-14, 12:47PM   #62
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Your car looks really good! Did you decide on cam specs yet?
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Old 11-30-14, 01:19AM   #63
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just about done with cold side. BOV is down behind my tranny cooler. Water/Meth nozzles will be in the charge pipe right before the carb hat.
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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.
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Old 11-30-14, 01:25AM   #64
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Quote:
Originally Posted by meanone View Post
Your car looks really good! Did you decide on cam specs yet?
Thx. Its coming along nice now that I have a little time to work on it.

Cam was spec'd by Travis Quillen.
Comp Cam Solid Roller
Lift with 1.65 rockers .571/.565
Duration @ .015 279/273
Duration @ .050 242/236
Lobe separation 112
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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.
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Old 11-30-14, 04:18PM   #65
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looks fanfreakingtastastic.
do you have some pics that show where the passenger side header collector v-band ends when installed. Like looking down from above,how far past the cylinder head does it stick out.
how about looking straight on from the front. How far down is the top of the v-band from say one of the accessory holes on the cylinder head.
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Old 11-30-14, 08:58PM   #66
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Quote:
Originally Posted by pontiacjeff468 View Post
looks fanfreakingtastastic.
do you have some pics that show where the passenger side header collector v-band ends when installed. Like looking down from above,how far past the cylinder head does it stick out.
how about looking straight on from the front. How far down is the top of the v-band from say one of the accessory holes on the cylinder head.
Thx man. I'm having fun building it.

These are some of the pictures Ron sent me when he built my headers.

My turbo is mounted to the frame and i wanted a flex coupler between the header and the turbo to allow the motor to move some. The passengers side pipe from the header to the turbo turns down and snakes under the balancer turns a 180 and goes up to the turbo. Adds almost 2 ft of 2.25" tube to the length. If the passengers side header turned down like the drivers side this would have been much easier. I'm still trying to come up with a better idea for this part. One positive thing is that I have a very straight path into the waste gate.
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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.
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Old 11-30-14, 10:21PM   #67
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thanks for the pics man. I got them to, but I lost and forgot about them. lol
From looking at that last one, with out going out and checking. I don't think it looks good for my hopes of incorporating into my existing merge. Its to darn cold out to go check so I'll have to see if I have any photos of my set up to compare.
mean while I'll be saving all of the pictures of what your doing.lol
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Old 11-30-14, 10:44PM   #68
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Quote:
Originally Posted by 7D9TA View Post
just about done with cold side. BOV is down behind my tranny cooler. Water/Meth nozzles will be in the charge pipe right before the carb hat.
I don't know if it matters to much, but the blow off valve is real far from the carb, maybe someone with a little more experience can chime in. I hear the closer the better. Looks great though!
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Old 12-01-14, 12:02AM   #69
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I don't see any reason for the BOV to be close to the carb hat, it only letting out pressure so the turbo doesn't so backwards when throttle blades close. It's pulling vacuum for signal so location should t make any real difference in my opinion.

Keep in mind though that fuel /air can be expelled so close to hot pipes may not be good especially when using methanol
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Old 12-01-14, 01:05AM   #70
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I found so much conflicting information on BOV placement. Went with a spot that fit the packaging. I hope the long run between the BOV and the nozzles prevents any of the water/meth from getting to atmosphere. I can put a shield around the BOV to make sure fumes go towards the fender air extractor or under the car if needed. Luckily its easy to move if required.
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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.
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Old 12-01-14, 04:08AM   #71
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Think of the inlet tube as a bottle w pressure in it, once the blades close its got no where to go, if you open the cap it's gonna get out. A waste gate is different. It's got an outlet past the turbine wheel it's already going there so it's easiest path is to continue past the turbine wheel so waste gates need to be placed better to convince the air to go out through it and bleed off pressure/flow.

Shake then Squeeze a 2 liter bottle of soda, now open the cap that's how a BOV works
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Old 12-04-14, 08:09PM   #72
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His bov will work fine it that location.. I have mine in almost the same spot and it works perfect....
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Old 12-06-14, 01:37AM   #73
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Quote:
Originally Posted by turbo louie View Post
His bov will work fine it that location.. I have mine in almost the same spot and it works perfect....
Appreciate the info.
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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.
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Old 12-06-14, 03:01PM   #74
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Quote:
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Appreciate the info.
No problem. That's what this site is for, to help each other out.....
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Old 12-22-14, 04:57AM   #75
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Originally Posted by turbo69BIRD View Post
I don't see any reason for the BOV to be close to the carb hat, it only letting out pressure so the turbo doesn't so backwards when throttle blades close.
Jeff should be right on here. Think of the butterfly valves on the throttle body or carb suddenly closing...pressure backs up in the pipe leading to it. That pressure is equal all the way back, through your intercooler straight back to your turbo. Just like when you blow up a balloon, the pressure isn't any greater by your lips than anywhere else in the balloon. I have seen some people say placement is important for the BOV, but I just don't see it. Blow a hole anywhere in that circuit and pressure drops.

By the way, love your work and the car looks great!
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