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Search found 1752 matches

by CGT
Sat Nov 16, 2019 8:54 pm
Forum: Engine Tech
Topic: Dart 180 cc alloy head as cast
Replies: 60
Views: 2196

Re: Dart 180 cc alloy head as cast

i was looking at oil ring tension yesterday standard oil ring 16 pounds with the fish scale i have 4'' bore oil ring that went 5 pounds drag i want to try a vacuum pump any way when i dyno engine with low tension rings and vac pump on the street can there be other issues. ring pack is 1.2 , 1.5 , 3...
by CGT
Sat Nov 16, 2019 2:55 pm
Forum: Engine Tech
Topic: Dart 180 cc alloy head as cast
Replies: 60
Views: 2196

Re: Dart 180 cc alloy head as cast

i was looking at oil ring tension yesterday standard oil ring 16 pounds with the fish scale i have 4'' bore oil ring that went 5 pounds drag i want to try a vacuum pump any way when i dyno engine with low tension rings and vac pump on the street can there be other issues. ring pack is 1.2 , 1.5 , 3...
by CGT
Fri Nov 15, 2019 8:45 pm
Forum: Engine Tech
Topic: LS trunnion upgrades & longevity
Replies: 19
Views: 558

Re: LS trunnion upgrades & longevity

Thanks, real info! Getting harder to find every day in this world. Boy that ain't no shit. :lol: My street car has about 10k miles on it like that...nice bullet hydraulic lobes, Manley Nextec beehives 221438-16 https://www.speed-talk.com/forum/viewtopic.php?f=1&t=51466&sid=8c303007e7d5571524fb2806e...
by CGT
Fri Nov 15, 2019 3:02 pm
Forum: Engine Tech
Topic: Rough HP Gain?
Replies: 18
Views: 639

Re: Rough HP Gain?

ClassAct wrote:
Fri Nov 15, 2019 9:49 am
This nails it. I wouldn't change the CR that far and not change the cam. I'd be interested to see what MJ has to say about that. As in a CR change and whether or not to change the cam.
What would you change about the cam for a 1.5 point increase in compression?..interesting topic.
by CGT
Fri Nov 15, 2019 12:18 pm
Forum: Engine Tech
Topic: LS trunnion upgrades & longevity
Replies: 19
Views: 558

Re: LS trunnion upgrades & longevity

LS1/LS2/LS6/truck style non-offset rockers. What's the lift limit before there's interference at the d-shaped bearing cap thing at the trunnion? None of the aftermarket 'upgrade' options really fill me with confidence (bushing wear with splash-lubed bronze, mystery-metal trunnions with direct-runni...
by CGT
Thu Nov 14, 2019 9:50 pm
Forum: Engine Tech
Topic: Rough HP Gain?
Replies: 18
Views: 639

Re: Rough HP Gain?

I'm thinking I might be misunderstanding the op's question :lol: Is this a compression or manifold query or both? Compression! But a bit of off track banter never hurt :lol: I was second guessing my interpretation...thinking maybe compression and manifold was changed at the same time. Be interestin...
by CGT
Thu Nov 14, 2019 8:40 pm
Forum: Engine Tech
Topic: Rough HP Gain?
Replies: 18
Views: 639

Re: Rough HP Gain?

I'm thinking I might be misunderstanding the op's question :lol: Is this a compression or manifold query or both?
by CGT
Thu Nov 14, 2019 7:46 pm
Forum: Engine Tech
Topic: Rough HP Gain?
Replies: 18
Views: 639

Re: Rough HP Gain?

Only 1 way to know, but my guess would be 7-10 average. Theyre could be some situations where it could be more, or less. How the extra compression is obtained is the big one. On a 23° 400 sbc, 11:1 is easy flat top territory, 12.5:1 is usually small .125ish tall dome territory(usually not to obtrusi...
by CGT
Tue Nov 12, 2019 3:35 pm
Forum: Engine Tech
Topic: Quadrajet lean spot.
Replies: 26
Views: 558

Re: Quadrajet lean spot.

I would inspect the secondary pull off.
by CGT
Mon Nov 11, 2019 8:53 pm
Forum: Engine Tech
Topic: LS3 Carbed build
Replies: 305
Views: 30570

Re: LS3 Carbed build

bobmc wrote:
Mon Nov 11, 2019 7:50 pm
did you end up using dowel shift?
Yes
by CGT
Mon Nov 11, 2019 4:27 pm
Forum: Engine Tech
Topic: Yet another valve stem seal thread
Replies: 12
Views: 368

Re: Yet another valve stem seal thread

Is it a different material or is the oil metering different and the orange just for identification? That's possible, but I recall it having less tension. The interesting thing is, that even in the GMPP catalog. Gm just calls out the use of 16 of the 10212810 seals for use on both intake and exhaust...
by CGT
Mon Nov 11, 2019 4:20 pm
Forum: Engine Tech
Topic: LS3 Carbed build
Replies: 305
Views: 30570

Re: LS3 Carbed build

Elroy wrote:
Sun Nov 10, 2019 8:34 pm
Any updates on this?
My goal is to have it back on the dyno in November, although I am currently at the mercy of a couple of suppliers.. along with a little fab work to the oil pickup tube.
by CGT
Mon Nov 11, 2019 3:33 pm
Forum: Engine Tech
Topic: Yet another valve stem seal thread
Replies: 12
Views: 368

Re: Yet another valve stem seal thread

I found LT1 seals are the same dimensions On LT1's and L31's etc from that era....these engines have a different intake and exhaust valve stem seal. The aftermarket tends to just sell 16 of the same intake seal. I like to use the GM seals in applications where the guide diameter allows. GM part# 10...
by CGT
Sat Nov 09, 2019 9:13 am
Forum: Engine Tech
Topic: LS3 Carbed build
Replies: 305
Views: 30570

Re: LS3 Carbed build

steve316 wrote:
Sat Nov 09, 2019 8:34 am
Chad do you know how much less this ls weight is than a aluminum head cast block first generation SBC. Thanks in advance Steve
This engine should be right about 400lbs
by CGT
Fri Nov 08, 2019 1:51 pm
Forum: Engine Tech
Topic: importance of and improving power curve
Replies: 99
Views: 10720

Re: importance of and improving power curve

gmrocket wrote:
Fri Nov 08, 2019 1:14 pm
I read on ST before nobody ever runs an Engine over that range,, it's stoopid
Does the person that said that suck at it? :lol: