L92 DynoJet Numbers Plus Plan B, C, D, E and F...
01-14-2008, 02:03 PM
#370
Wow, this thread is almost a year old now but I thought I'd continue on here.
Saturday, I'm going to take a run back down to Ed Hutchings to try a few more things on the engine. I was going to send the rockers off to HS to have the trunion's modded but I picked up a set of Yella Terra Ultralights for a little more. Ed recently picked up 9 RWHP with just the YT's on a friends 383 build. Ed recently installed a ported L76 intake on a GTO and picked up 10 RWHP but 20 RWT. I'm sure I'll end up with one of the new manifolds when they come out but wanted to try this for now.
I've replaced the repro wheels with some lighter CCW Classics also. Taking out the C6 shifter and trying one of the new MGW's, It's very nicely made and is getting good reviews.
As usual, we'll post up our results here. Let's see what the numbers are now.
BTW: I've got about 4k on the car since this build and it's been nothing but a blast to drive. No smoke, no oil usage just tire roasting fun.
Saturday, I'm going to take a run back down to Ed Hutchings to try a few more things on the engine. I was going to send the rockers off to HS to have the trunion's modded but I picked up a set of Yella Terra Ultralights for a little more. Ed recently picked up 9 RWHP with just the YT's on a friends 383 build. Ed recently installed a ported L76 intake on a GTO and picked up 10 RWHP but 20 RWT. I'm sure I'll end up with one of the new manifolds when they come out but wanted to try this for now.
I've replaced the repro wheels with some lighter CCW Classics also. Taking out the C6 shifter and trying one of the new MGW's, It's very nicely made and is getting good reviews.
As usual, we'll post up our results here. Let's see what the numbers are now.
BTW: I've got about 4k on the car since this build and it's been nothing but a blast to drive. No smoke, no oil usage just tire roasting fun.
01-14-2008, 02:14 PM
#371
Revived!
Anxious to hear what you find out on the intake. I am now using the LS3 which is ultra similar, and note like the L76, there is not much plastic to grind on. Also find a bit more torque and hp these days running a bit richer than we were aiming for back then. Still think the heads are the hot ticket in that we are getting square hp/tq #s even with larger displacement.
Bruce
Anxious to hear what you find out on the intake. I am now using the LS3 which is ultra similar, and note like the L76, there is not much plastic to grind on. Also find a bit more torque and hp these days running a bit richer than we were aiming for back then. Still think the heads are the hot ticket in that we are getting square hp/tq #s even with larger displacement.
Bruce
01-14-2008, 02:53 PM
#372
Wow, this thread is almost a year old now but I thought I'd continue on here.
Saturday, I'm going to take a run back down to Ed Hutchings to try a few more things on the engine. I was going to send the rockers off to HS to have the trunion's modded but I picked up a set of Yella Terra Ultralights for a little more. Ed recently picked up 9 RWHP with just the YT's on a friends 383 build. Ed recently installed a ported L76 intake on a GTO and picked up 10 RWHP but 20 RWT. I'm sure I'll end up with one of the new manifolds when they come out but wanted to try this for now.
I've replaced the repro wheels with some lighter CCW Classics also. Taking out the C6 shifter and trying one of the new MGW's, It's very nicely made and is getting good reviews.
As usual, we'll post up our results here. Let's see what the numbers are now.
BTW: I've got about 4k on the car since this build and it's been nothing but a blast to drive. No smoke, no oil usage just tire roasting fun.
Saturday, I'm going to take a run back down to Ed Hutchings to try a few more things on the engine. I was going to send the rockers off to HS to have the trunion's modded but I picked up a set of Yella Terra Ultralights for a little more. Ed recently picked up 9 RWHP with just the YT's on a friends 383 build. Ed recently installed a ported L76 intake on a GTO and picked up 10 RWHP but 20 RWT. I'm sure I'll end up with one of the new manifolds when they come out but wanted to try this for now.
I've replaced the repro wheels with some lighter CCW Classics also. Taking out the C6 shifter and trying one of the new MGW's, It's very nicely made and is getting good reviews.
As usual, we'll post up our results here. Let's see what the numbers are now.
BTW: I've got about 4k on the car since this build and it's been nothing but a blast to drive. No smoke, no oil usage just tire roasting fun.
PS. 21,000 views. I guess people are interested in the L92s.
01-14-2008, 05:16 PM
#373
Wow, this thread is almost a year old now but I thought I'd continue on here.
Saturday, I'm going to take a run back down to Ed Hutchings to try a few more things on the engine. I was going to send the rockers off to HS to have the trunion's modded but I picked up a set of Yella Terra Ultralights for a little more. Ed recently picked up 9 RWHP with just the YT's on a friends 383 build. Ed recently installed a ported L76 intake on a GTO and picked up 10 RWHP but 20 RWT. I'm sure I'll end up with one of the new manifolds when they come out but wanted to try this for now.
I've replaced the repro wheels with some lighter CCW Classics also. Taking out the C6 shifter and trying one of the new MGW's, It's very nicely made and is getting good reviews.
As usual, we'll post up our results here. Let's see what the numbers are now.
BTW: I've got about 4k on the car since this build and it's been nothing but a blast to drive. No smoke, no oil usage just tire roasting fun.
Saturday, I'm going to take a run back down to Ed Hutchings to try a few more things on the engine. I was going to send the rockers off to HS to have the trunion's modded but I picked up a set of Yella Terra Ultralights for a little more. Ed recently picked up 9 RWHP with just the YT's on a friends 383 build. Ed recently installed a ported L76 intake on a GTO and picked up 10 RWHP but 20 RWT. I'm sure I'll end up with one of the new manifolds when they come out but wanted to try this for now.
I've replaced the repro wheels with some lighter CCW Classics also. Taking out the C6 shifter and trying one of the new MGW's, It's very nicely made and is getting good reviews.
As usual, we'll post up our results here. Let's see what the numbers are now.
BTW: I've got about 4k on the car since this build and it's been nothing but a blast to drive. No smoke, no oil usage just tire roasting fun.
How much are they getting for the MGW C5 Shifter and shift ****??
From what I've read they are supposed to be well balanced....flick of the wrist shift?
01-14-2008, 10:03 PM
#376
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Guy's I have an L92/408 vette, as soon as I dyno Ill let you peeps know the result. I have a much bigger cam than what people have posted in this thread.. Duration is in 25x-26x, lift in in the mid .600's.. Heads are mild ported on the intake and a full port on the exhaust. As soon as the snow melts Ill have the results...
01-15-2008, 07:30 AM
#377
Guy's I have an L92/408 vette, as soon as I dyno Ill let you peeps know the result. I have a much bigger cam than what people have posted in this thread.. Duration is in 25x-26x, lift in in the mid .600's.. Heads are mild ported on the intake and a full port on the exhaust. As soon as the snow melts Ill have the results...
01-15-2008, 02:15 PM
#378
01-19-2008, 08:27 AM
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I could agree with that. I wouldnt mind seeing someone drop the intake size to say, 2.1 and increasing the exhaust valve size .050 or .060. Dont know if thats doable based on the size of the exhaust port, bowl shape, yada, yada.
I mean, the intake valve is almost what a BBC factory square port valve is (2.19) and those used to be considered BIG back in the day.
I mean, the intake valve is almost what a BBC factory square port valve is (2.19) and those used to be considered BIG back in the day.
I also learned that a short runner single plane style intake eats up overlap and kills reversion. Atleast that is what I have found with my 20 degrees of overlap with the 244/248 113+2 cam.
After reading your results... searching... and speaking with those that know... I have a feeling someone is going to recommend a smaller cam with more agressive numbers at .200 vs crazy duration numbers at .050.....
what I found really interesting is that comp suggesting keeping the same cam with the XER lobes and just moving it around to a 109 intake centerline....
my ported head pics:
Last edited by WizeAss; 01-19-2008 at 10:19 AM.