Ls2 408 stroker
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I corrected that ....fwhp. Launch trust me I know how it is here....again Trust me.
I'm not perfect! Call JC if you looking 4 perfect... LMAO! Real Talk!
Look @ the time posted?
I'm not perfect! Call JC if you looking 4 perfect... LMAO! Real Talk!
Look @ the time posted?
Last edited by Smokey B; Dec 21, 2019 at 08:48 AM.
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He is a professional.
He has had a lot of experience with e85.
This is the fuel he uses with his drag car also.
He has a dart aluminium block, a big solid roller with a massive single turbo.
Don't forget my engine has been running exclusively on e85 for 3 years or so and I never had an issue with the tune.
All was good.
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The only thing we have to change now are the damn lifters.
Then everything should be all good to go.
I'm hoping these other lifters will not require a different pushrod length.
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I'm always like this.....in that thread that was my thoughts or ideas & not stated as what others should think. U took that 1 comment the wrong way...Hell wish I would've stayed simple. Ls3 heads 408 and a hydraulic roller. Instead I'm chasing my own ghost...if you know more you'll generally want more.
Reason for not building the the 408 & Ls3 heads and jumping to Ls7 heads and not just building what's already owned. Lord bless finish and build another head. That's always my goal.
Reason for not building the the 408 & Ls3 heads and jumping to Ls7 heads and not just building what's already owned. Lord bless finish and build another head. That's always my goal.
Originally Posted by Launch
Thanks man. And actually we don't disagree because I never said Rwhp.. If you go back to my original post that Smokey was quoting me on .. i said "struggle to be 750fwhp". So when i replied to him and said 750 is easily done with good parts, i was meaning my original 750 Fwhp figure. Because I knew that's what I said the first time.
Smokey misquoted me and said Rwhp.. and made it look like I was speaking about RWHP when I wasn't. I'd never say or think that 750 rear wheel hp from an ls7 is easily done. That's close to 900 flywheel.
.
Smokey misquoted me and said Rwhp.. and made it look like I was speaking about RWHP when I wasn't. I'd never say or think that 750 rear wheel hp from an ls7 is easily done. That's close to 900 flywheel.
.
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Originally Posted by bortous
All good Darth.
We do not have many LS7 combinations as these engines were only a rarity. They only came out in some special edition HSV's.
They make around 430rwkw with heads and camshaft which is 576rwhp +10% which equals around 640rwhp in the USA.
We have higgins race heads who have a Darin Morgan CNC program for the GM LS7 heads.
If I ever go that route, that's what I will do.
We do not have many LS7 combinations as these engines were only a rarity. They only came out in some special edition HSV's.
They make around 430rwkw with heads and camshaft which is 576rwhp +10% which equals around 640rwhp in the USA.
We have higgins race heads who have a Darin Morgan CNC program for the GM LS7 heads.
If I ever go that route, that's what I will do.
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I'm always like this.....in that thread that was my thoughts or ideas & not stated as what others should think. U took that 1 comment the wrong way...Hell wish I would've stayed simple. Ls3 heads 408 and a hydraulic roller. Instead I'm chasing my own ghost...if you know more you'll generally want more.
Reason for not building the the 408 & Ls3 heads and jumping to Ls7 heads and not just building what's already owned. Lord bless finish and build another head. That's always my goal.
Reason for not building the the 408 & Ls3 heads and jumping to Ls7 heads and not just building what's already owned. Lord bless finish and build another head. That's always my goal.
Sometimes you come across as an *** and you put down other people's builds for no good reason.
But it doesn't matter.
All is good.
Ls7 heads are in another league over LS3 heads.
See this is where you lose me. Put in crap parts? HOW DOES HE KNOW THEY ARE CRAP BEFORE FITTING THEM?
Man.... my point is going totally over the top of some of your heads.
Owner: Has a perfectly fine, strong running hydraulic 408. Tuned by the same guy. Wants more HP.
Tuner/Builder: Makes some suggestions, based on his best knowledge.
Owner: Notes suggestions, comes to forums to get more advice. Decides to go llsr based off all the great reviews.
Tuner: Suggests his preffered solid lifters. Gets handed a cam and some other lifters. Easy swap. Gets it running, oil pressure is f*cked.
Owner: What's wrong and what do we do?
Tuner: I think the lifters must be bleeding oil pressure.
OK, so how was he to know the lifters would do this, if he has never fitted these lifters previously???????
This is just getting dumb now. Bortous knows what needs to be done. He needs to buy a set of solid lifters that someone else has already proven in an OEM block.
He said forced induction or another engine isn't on the cards right now (i think).. so my suggestion, he waits for Darth to finish his LS7, once the oil pressure is good (which i think it will be), he buys those lifters. And direct from Summit racing. No aussie vendors (which they don't stock them anyway). Because you never know, because there was counterfeit (china copies) morel lifters doing the rounds. And a trusted USA seller like Summit won't do that.
Man.... my point is going totally over the top of some of your heads.
Owner: Has a perfectly fine, strong running hydraulic 408. Tuned by the same guy. Wants more HP.
Tuner/Builder: Makes some suggestions, based on his best knowledge.
Owner: Notes suggestions, comes to forums to get more advice. Decides to go llsr based off all the great reviews.
Tuner: Suggests his preffered solid lifters. Gets handed a cam and some other lifters. Easy swap. Gets it running, oil pressure is f*cked.
Owner: What's wrong and what do we do?
Tuner: I think the lifters must be bleeding oil pressure.
OK, so how was he to know the lifters would do this, if he has never fitted these lifters previously???????
This is just getting dumb now. Bortous knows what needs to be done. He needs to buy a set of solid lifters that someone else has already proven in an OEM block.
He said forced induction or another engine isn't on the cards right now (i think).. so my suggestion, he waits for Darth to finish his LS7, once the oil pressure is good (which i think it will be), he buys those lifters. And direct from Summit racing. No aussie vendors (which they don't stock them anyway). Because you never know, because there was counterfeit (china copies) morel lifters doing the rounds. And a trusted USA seller like Summit won't do that.
Originally Posted by bortous
That particular dyno jet seems accurate.
Taking 10% from that figure would only make that 520rwhp which would mean it's not a healthy engine.
Taking 10% from that figure would only make that 520rwhp which would mean it's not a healthy engine.
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There was valve-train instability in the beginning where power was falling off a cliff after 6000rpm but this was fixed.
There was still something going on valvetrain related after this because of the low power figure.
Now we know there isn't.
The runners being a restriction was an assumption but it was obviously incorrect.
The engine did rev a hell of a lot more freely with the mid length runner though.
It still worked out good in one way as the mid length runners didn't lose torque and I have much more RPM.
I have the option of mix and matching the runners now plus I can always re do a pull with the longer runners to see what happens.
It could be the way I am explaining this.
But then again after I post something here, things change and so does the diagnosis.
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I really need to study and learn.
134MPH down the 1/4 mile and the weight I understand, but to match that with the air and power figure is beyond me at this point.
Haha