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A bit of a let down but very puzzled and looking for answers...
we should have made 550-560 vs 470-480... We're missing out on almost 100RWHP.. Compression is 11.2:1 running from front to back...varamar air intake, speed density tune so we have a 4.25" coupler from intake to NW102 throttle body no restriction what so ever. From NW102 it goes into the MSD airforce Intake ( debuted at SEMA 2014 and is said to make more power than the fast 102 due to flow technology?? ) Then we get into engine as it was blue printed by halston at Hsquared racing in Houston Tx, from there we have a monster stage 5 clutch with light weight flywheel, 1 7/8 headers into X pipe and into BB bullet exhaust ( no restriction ) car has 4:10 gears for low end torque.
A bit of a let down but very puzzled and looking for answers...
we should have made 550-560 vs 470-480... We're missing out on almost 100RWHP.. Compression is 11.2:1 running from front to back...varamar air intake, speed density tune so we have a 4.25" coupler from intake to NW102 throttle body no restriction what so ever. From NW102 it goes into the MSD airforce Intake ( debuted at SEMA 2014 and is said to make more power than the fast 102 due to flow technology?? ) Then we get into engine as it was blue printed by halston at Hsquared racing in Houston Tx, from there we have a monster stage 5 clutch with light weight flywheel, 1 7/8 headers into X pipe and into BB bullet exhaust ( no restriction ) car has 4:10 gears for low end torque.
Heads? Cam?
Cause If not you are where you should be.
Heads are 225 ported polished by Hsquared racing 65cc with 5 angle valve job
I've been looking at a pretty similar build and Lethal racing said to expect between 500-525 rwhp. You are going to dyno a bit less due to the 4.10s. Might have a stingy dyno.
I'm just saying it might be about right really?
The MSD intake is the unknown with your combo imo.
That's the conundrum for me. I'm looking at $10k for about 75 hp going to a 416ci kit. That's tough to swallow cause the cost per dollar kind of sucks.
A bit of a let down but very puzzled and looking for answers...
This is about where I was on a H/C LS2. I haven't seen much on the MSD, is it possible it doesn't flow as well as they had hoped? As Suns_PSD said, it's the only unknown at this point. You will read a little lower with 4.10s but t I wouldn't expect that much. How does your tuner feel? Based on other cars they've built/tuned and seen run on their dyno, do they feel it's way off?
Originally Posted by Suns_PSD
I've been looking at a pretty similar build and Lethal racing said to expect between 500-525 rwhp. You are going to dyno a bit less due to the 4.10s. Might have a stingy dyno.
I'm just saying it might be about right really?
The MSD intake is the unknown with your combo imo.
That's the conundrum for me. I'm looking at $10k for about 75 hp going to a 416ci kit. That's tough to swallow cause the cost per dollar kind of sucks.
I'm in a similar boat. Although I was forced to do a rebuild, I decided to go with a stroker but I don't want the power to be close to what I was at with stock cubes for the money I have to shell out. I'm having a 402 built and I was told to expect the numbers you were quoted for a 416. This concerns me. I've been trying to follow stroker builds pretty closely because I'm in the process of one myself, and it seems to me the numbers are all over the place. We have some 402s making close to 600rwhp and then a 413 making under 500.
This is about where I was on a H/C LS2. I haven't seen much on the MSD, is it possible it doesn't flow as well as they had hoped? As Suns_PSD said, it's the only unknown at this point. You will read a little lower with 4.10s but t I wouldn't expect that much. How does your tuner feel? Based on other cars they've built/tuned and seen run on their dyno, do they feel it's way off?
I'm in a similar boat. Although I was forced to do a rebuild, I decided to go with a stroker but I don't want the power to be close to what I was at with stock cubes for the money I have to shell out. I'm having a 402 built and I was told to expect the numbers you were quoted for a 416. This concerns me. I've been trying to follow stroker builds pretty closely because I'm in the process of one myself, and it seems to me the numbers are all over the place. We have some 402s making close to 600rwhp and then a 413 making under 500.
Let us know what you find out ez2spd.
Absolutely. Will throw on a fast 102 and Dyno it again. Yes 4:10 will drop it a bit but not that much! The engine builder was shooting for 550rwhp lethal who tuned it said it was a bit low for such a large engine... Cam may be holding it back some but I have seen this cam on stock cubes make 540rwhp... I had a 402 stroker that made 525rwhp and went with the 414ci since it was 11.5:1 compression and should have made 550rwhp.. So we're loosing out on 75-100hp with something.. Car grabs strong after 4500-5,000 but low end torque is little to none.. We're back at the drawing board and will update this with findings...
Absolutely. Will throw on a fast 102 and Dyno it again. Yes 4:10 will drop it a bit but not that much! The engine builder was shooting for 550rwhp lethal who tuned it said it was a bit low for such a large engine... Cam may be holding it back some but I have seen this cam on stock cubes make 540rwhp... I had a 402 stroker that made 525rwhp and went with the 414ci since it was 11.5:1 compression and should have made 550rwhp.. So we're loosing out on 75-100hp with something.. Car grabs strong after 4500-5,000 but low end torque is little to none.. We're back at the drawing board and will update this with findings...
Well based on that it has to be the intake. Same cam as before? Proven head work or same as before?
If everything seems fine mechanically, then take it to another dyno or track it and see what happens.
Well it seems to be lacking low end torque... This cam is a low end cam with the 4.10 gears one would think that should be good but the power doesn't kick in till 4500-5000 at that point it's a bat out of hell for what it is..
Well it seems to be lacking low end torque... This cam is a low end cam with the 4.10 gears one would think that should be good but the power doesn't kick in till 4500-5000 at that point it's a bat out of hell for what it is..
Was the cam degreed in? Who installed it? Comp cams are known to be off straight from factory every now and then.
Was the cam degreed in? Who installed it? Comp cams are known to be off straight from factory every now and then.
Yes it was degreed in, installed by H Squared racing in Houston tx, fully blue printed and balanced 414CI. It was a custom grind Brian Tooley cam based on his stage 3 grinds
Yes it was degreed in, installed by H Squared racing in Houston tx, fully blue printed and balanced 414CI. It was a custom grind Brian Tooley cam based on his stage 3 grinds
Looks like you have our LS1/LS2 Stg III shelf cam, although that cam has made over 500 rwhp on a stock block LS2 using TFS As Cast 220 heads and a port matched Fast 102.
Looks like you have our LS1/LS2 Stg III shelf cam, although that cam has made over 500 rwhp on a stock block LS2 using TFS As Cast 220 heads and a port matched Fast 102.
What would you recommend going with to break into the 500rw range, this cam and set up has no low end torque. Feels stock up till 4800rpm then it wakes up till 5,500rpm...
I chased a low power 416 LS3 stroker, not only low power but the most miserable running over cam'd POS I've ever owned. It was spec'd, built & tuned by big name sponsor LS guru's. I was told to chase dyno's until I rang up the number I was expecting, sorry that doesn't work for me.......a turd is a turd.
What I have now is a low 600rwh/518rwt nicely running deal. I can post a HPT log where it is engaging traction control @ 106mph. It's a beast
The short block itself has been perfect, the builder of that is not big name. My camshaft is similar to what you are running, degree'd & idles nicely 875rpm. The cylinder heads were the problem, when flowed independently they would never make the power level I was expecting.
I chased a low power 416 LS3 stroker, not only low power but the most miserable running over cam'd POS I've ever owned. It was spec'd, built & tuned by big name sponsor LS guru's. I was told to chase dyno's until I rang up the number I was expecting, sorry that doesn't work for me.......a turd is a turd.
What I have now is a low 600rwh/518rwt nicely running deal. I can post a HPT log where it is engaging traction control @ 106mph. It's a beast
The short block itself has been perfect, the builder of that is not big name. My camshaft is similar to what you are running, degree'd & idles nicely 875rpm. The cylinder heads were the problem, when flowed independently they would never make the power level I was expecting.
That's what we need... I'm going to go a bit more aggressive on the head porting and a larger cam in hopes of squeezing a bit more out!
It's a blast but lacks power where it should excel...
Will go after a custom BTR cam and see what further changes can be made... PatG has also been very helpful!!
hang on before adding "more" that may not be the answer...and might.
Id want to know what the heads are doing and where, have them cc/d flowed go from there;find your culprit(s) first
4" stroke can move a lot of air (intake, too!) bet theres some on the table there.
Bet Mamo could set you in the right direction
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