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Highest rwhp from NA fbody???

 
Old 12-06-2018, 09:14 PM
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Originally Posted by Darth_V8r View Post
I think I seen damn near 600 on a short stroke big bore. Basically a 4.125 x 3.27. Spun to the moon and back
yup 594 rwhp with 346 CI through a stalled th400. Would be well over 600 with a t56.
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Old 12-06-2018, 09:52 PM
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Ima give a mild build 346 a whirl after this water in the oil bad luck with the ls7. I don't have the budget for a set of these mamo heads but i still think somewhere around 550whp can be done. After all the bolt on ls6 did 451whp so a decent compression bump, a Darth spec'd cam and some ported 243s should get 100hp i think.
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Old 12-06-2018, 10:05 PM
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Originally Posted by Darth_V8r View Post
Yes. The first post in that ghost hawk build thread is where I ended up. I kept it updated with everything. But its worth reading the whole thread, because beyond the mods, I posted every mistake I made. There are a lot of nuggets in that thread beyond the list of parts. I do think there may have been another 20 or so HP, but I was not going to get it. I was losing compression and on disassembly I found hot spots on the bearings. My rings were not badly worn but they had no spring in them anymore.

Be cool if you did beat it. Mixed emotions for me though. Lol

Honest question -- you think the mast small bores might beat the Mamo 220? I kind of doubt it myself.

That thing really was a badass 346.
Jake,
You absolutely had the best performing Streetable SBE 346" that I have seen on Tech
in the over 12 years that I have been following. The "easiest" way LOL!
to surpass that would be to duplicate (You so generously provided the full details)
add .5 Compression, .020" lift, +3-4* of cam durations with the correct events.
Not to original however.

I believe the MMS 220s are the best Heads for a 3.9" Bore, especiall factoring the
port & valve sizes, compared to the Mast Small Bore LS3 which are 240 CCs as
you know. However I believe the FAST LS3 W/ Mid-Length Runners are Ideal to
provide peak HP between 7000-7500 RPM, and while you definitively proved the
MSD peaked & carried beyound the FAST 102 Cathedral. I Believe the MID-Length
peaks and carries beyound the MSD, Unfortunately we can't compare with the
same Heads.

My initial post was in no way ment to disparage your results.
It was just a different idea on how to possibly exceed 550 RWHP with a
"streetable" SBE 346" and a extreme budget.

Last edited by NAVYBLUE210; 12-17-2018 at 10:44 PM.
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Old 12-06-2018, 10:19 PM
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Oh that's a great point about the intake options. And you're right. Go to 12.x compression, add cam, should beat it. Would require flycut. I would not push it any tighter than where I was on PTV.

I didn't take any offense or anything. I was honestly just asking your opinion
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Old 12-19-2018, 09:37 AM
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Originally Posted by bnastystuntz View Post
i bet u could get upper 500 dependin on setup.... bump the compression ration 13:1 Good set of heads ...How u thinK TEXAS SPEED got that stock bottom end record .
You will be surprised how many stock 346ci have achieved lower than 9.6x in stock bottom ls1.. not everyone posts this in the forums. as a matter of fact, some of them dont even have that high of a compression and running ported 243's.

The trick is to invest in making the vehicle extremely light weight... one of the fbodies i am talking about showed up lower 2400lbs and a fox body with a stock cube na ls1 ran 9.3 with 2150lbs with some patriot 243's, vic jr intake a hyd roller cam...
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Old 12-29-2018, 02:01 AM
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Originally Posted by Public Enemy View Post
You will be surprised how many stock 346ci have achieved lower than 9.6x in stock bottom ls1.. not everyone posts this in the forums. as a matter of fact, some of them dont even have that high of a compression and running ported 243's.

The trick is to invest in making the vehicle extremely light weight... one of the fbodies i am talking about showed up lower 2400lbs and a fox body with a stock cube na ls1 ran 9.3 with 2150lbs with some patriot 243's, vic jr intake a hyd roller cam...
id rather less weight myself. my ws6 is heavy compared to the Camaro. i think a 200+ lbs difference. mine weighs like 3500 w/o me in it and my buddies Camaro weighs like 3300 and he basically full weight minus spare
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Old 01-03-2019, 11:50 AM
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Originally Posted by Public Enemy View Post
You will be surprised how many stock 346ci have achieved lower than 9.6x in stock bottom ls1.. not everyone posts this in the forums. as a matter of fact, some of them dont even have that high of a compression and running ported 243's.

The trick is to invest in making the vehicle extremely light weight... one of the fbodies i am talking about showed up lower 2400lbs and a fox body with a stock cube na ls1 ran 9.3 with 2150lbs with some patriot 243's, vic jr intake a hyd roller cam...
Real street car i'm sure
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Old 01-03-2019, 05:10 PM
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Originally Posted by ddnspider View Post
Real street car i'm sure
Lol no way street car.. But neither was the tsp race car as well..



​​
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Old 01-03-2019, 05:33 PM
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Yeah I know just kidding .
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