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#221
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I think I'm going to replace the lifters with some high end solids and do the hybrid thing as we had an awful lot of valve train noise out of these Crane hydraulic rollers. Not at all happy with them, but they were the best we could source at the time. Just hope Herb at Luhn can hook me up with another cam. I really like the power and drivability of this grind.
What really sucks is if this wouldn't have happened we would have won our class and fastest Pontiac award during Drag Week.
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1964 GTO 501, Edelbrock Heads NA, 3460 lbs. 9.76 @ 137mph 1971 Trans Am Lucy Blue, 11.56 @ 115 1966 LeMans. 462, SD prepped Kaufman D ports. 11.90 @ 112 1976 Trans Am twin turbo 462, SD Edelbrock heads 8.50@159 2009 G8 GT |
The Following User Says Thank You to ErikW For This Useful Post: | ||
#222
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I picked up a set of Johnson Short Travel Lifters ( ST21120PR ) for my build...
I have a set of USED COMP CAMS 857s if interested... Not solids SPEED SAFE, NICK
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"The grass is not greener on the other side, its just fertilized with different $h!t" |
#223
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I'm glad you only have cam and lifter damage. No need to deal with machine work downtime and buying some bottom end parts. I was surprised when you said that you had a rod knock and found your running an Oliver rods and Crower crank. You did not cheap out on your bottom end parts selection. Good luck
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#224
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Quote:
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1964 GTO 501, Edelbrock Heads NA, 3460 lbs. 9.76 @ 137mph 1971 Trans Am Lucy Blue, 11.56 @ 115 1966 LeMans. 462, SD prepped Kaufman D ports. 11.90 @ 112 1976 Trans Am twin turbo 462, SD Edelbrock heads 8.50@159 2009 G8 GT |
#225
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#226
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Creeping up on timing and boost. Reading plugs after every pass. Baby steps. We've got too much time and money invested to just put a "moon tune" in it and send it. We've been down that road with our LS Camaro. Melted 2 pistons from too much timing and not enough fuel. Not going to repeat that.
So from what some boosted experts are telling me. They think the aluminum rockers are the culprit. Too much flex under boost in the exhaust rockers so I will switch up to Crower Stainless Rollers when she goes back together along with a stud girdle and lifter bore brace just for peace of mind. Bullet can fix the cam they said so I'll be sending that off. Probably going to hone and re-ring while we're at it.
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1964 GTO 501, Edelbrock Heads NA, 3460 lbs. 9.76 @ 137mph 1971 Trans Am Lucy Blue, 11.56 @ 115 1966 LeMans. 462, SD prepped Kaufman D ports. 11.90 @ 112 1976 Trans Am twin turbo 462, SD Edelbrock heads 8.50@159 2009 G8 GT Last edited by ErikW; 09-20-2021 at 01:43 PM. |
#227
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Quote:
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#228
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There are Pontiac people out there running 40 psi of boost who run even less timing with great durability and 4 horsepower per cubic inch power levels.
People who run high levels of timing on boosted engines are the Parts Suppliers best friends. Eric W has timing on a boosted engine figured out. Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#229
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That sure looks familiar. I exploded a Comp solid roller wheel on DW 2015. Replaced with bushed Crowers.
Nice meeting you and your wife at Byron. Hopefully cya next year.
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65 Lemans Street Car - 521, T400, 3.70 9". 10.13 @ 135. 3770 lbs. Drag Week ‘14, ‘15, ‘17 63 Lemans Race Car- 8.81 @ 151, 5.60 @ 123(SOLD) 67 Bonneville ragtop 74 Firebird - 455, e heads, TK0600 in process |
#230
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Nice meeting you too. I'm either going to go with bushed Crowers or BAMs.
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1964 GTO 501, Edelbrock Heads NA, 3460 lbs. 9.76 @ 137mph 1971 Trans Am Lucy Blue, 11.56 @ 115 1966 LeMans. 462, SD prepped Kaufman D ports. 11.90 @ 112 1976 Trans Am twin turbo 462, SD Edelbrock heads 8.50@159 2009 G8 GT |
#231
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Piston #4 of the group for sure las a large crack in a bas spot on the piston.
But you might be able to grind enough of the crack away and still have a strong piston. Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#232
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So since you have some driving/racing miles on the combo, what are your thoughts on the stainless headers? How are they holding up? Any issues?
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James 1970 Trans Am Spotts Built 484" IA2, Highports, EFI Northwind Terminator X sequential EFI fabrication and suspension by https://www.funkhouserracecars.com/ |
#233
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They work great, only issue we haven't completely solved yet is that the front header bolt on each side tends to loosen up after a couple passes or a long road trip. It has fallen out several times. We are trying different length bolts and lock washers. There is not enough room for one of the locking type bolts in our application because of the front motor plate. Those two bolts are a son of a bitch to install and service because of it. In a situation with no front plate it would not even be an issue. We use a Remflex gasket with them and that might be a cause but I like to know that they are well sealed. We monitor back pressure and so far we have seen a fairly equal amount of BP to boost. Overall they are performing great. No signs of cracking or distortion. Great product.
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1964 GTO 501, Edelbrock Heads NA, 3460 lbs. 9.76 @ 137mph 1971 Trans Am Lucy Blue, 11.56 @ 115 1966 LeMans. 462, SD prepped Kaufman D ports. 11.90 @ 112 1976 Trans Am twin turbo 462, SD Edelbrock heads 8.50@159 2009 G8 GT |
#234
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Quote:
The set -up basically looked like this
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James 1970 Trans Am Spotts Built 484" IA2, Highports, EFI Northwind Terminator X sequential EFI fabrication and suspension by https://www.funkhouserracecars.com/ |
#235
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Years ago, I had a set of JR Headers that were custom "Flat Collector" headers.
They adapted "D-Port" ported Heads to "Round Port" Headers. They used a very unique adaptor plate that attached to the heads with "counter-sunk" head fasteners. Then, the round port headers attached to the Adaptor plate using different mounting holes vs the Pontiac ones. These headers were extremely to install or remove and the fasteners to the heads were "Trapped" and could not back off. The header plate fastener holes were away from the heat of the exhaust ports on the head and would not "back off" either. Some very nicely designed and built headers and how they were retained on the D-Port heads. Food for thought. Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#236
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First couple heat cycles on header gaskets, you have to tighten them hot. Once the gasket takes a 'set', they shouldn't loosen. if they do, they are moving around for other reasons.
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. 1970 GTO Judge Tribute Pro-Tour Project 535 IA2 http://forums.maxperformanceinc.com/...d.php?t=760624 1971 Trans Am 463, 315cfm E-head Sniper XFlow EFI, TKO600 extreme, 9", GW suspension, Baer brakes, pro tour car https://forums.maxperformanceinc.com...ght=procharger Theme Song: http://www.youtube.com/watch?v=7zKAS...ature=youtu.be |
#237
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Quote:
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1964 GTO 501, Edelbrock Heads NA, 3460 lbs. 9.76 @ 137mph 1971 Trans Am Lucy Blue, 11.56 @ 115 1966 LeMans. 462, SD prepped Kaufman D ports. 11.90 @ 112 1976 Trans Am twin turbo 462, SD Edelbrock heads 8.50@159 2009 G8 GT |
#238
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Torqued a couple of times after head heat cycles and then safety wired may be your best option.
Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#239
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Depends on what the initial timing is and what fuel he's running also. IMO
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6.98 @ 199mph 4.53 @ 164mph |
#240
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Quote:
Just looked them up: PN #8916S https://www.stage8.com/gm-performanc...der-bolt-kits/ SPEED SAFE, NICK
__________________
"The grass is not greener on the other side, its just fertilized with different $h!t" |
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