441LSXTT

I was just curious if anybody has done it and how much power that they get out of it? I would think 700+rwhp. I have H/C/I now. But wanted more

Unreal

It is the intake that limits the cars. If you don't mind cutting hood/cowl, sure you could make 675+, but more cubes, through a underhood intake is going to tap out around same, and the cubes will just add low end torque but the top end will choke it down up high.

441LSXTT

So even a Mamo MSD would choke it? I have AI 280 heads with ARH 2inch headers. What intake would you recommend

Unreal

Yes, even a mamo MSD would choke it depending on end goals.

Intake depends on build, RPM range, cam etc etc.

441LSXTT

It is for a street driven 08 ZO6. With hwy runs. My cars makes 625rwhp N/A now, but if I could get 700ish I think I might do it.

Unreal

The cost difference is HUGE. IMO throw a 100 shot on it and be done.

polyol

Would be cool though!

Yeah agreed, tune it for E85 or spray it.

MikeOC

nuke61

468 ci from Horsepower Research:
Currently we have customer making over 725 rwhp using this engine with no power adders, std FAST intake manifolds and 93 octane pump fuel and street friendly cam packages. - https://horsepower-research.com/coll...nt=41434516487

441LSXTT

Thank you. For that price I think its worth it.

351carlo

I'd like to see details of a NA 93 octane build with a standard FAST making over 725rwhp (assuming we're talking honest SAE numbers on a credible Dyno).

I don't recall seeing anything come close to that with 468CID.

441LSXTT

If I could achieve 700+ rwhp I would love to build N/a motor. I just can't decide on a N/a motor or going with the UPP TwinTurbo kit. I was wanting to keep it all motor because it's kind of my daily driver and my other car is TwinTurbo.

441LSXTT

725 is a lot n/a. Hope some other people can produce dyno results or other vendors can chime in so I can discuss my next build

double06

There was a Silver Z06 on the forum here about 2 years ago (it was a 502) that a shop was advertising what they did I think they were out of Atlanta and it did 690 rwhp at the tire through and automatic. I think it had a standard hood so it must have been a FAST or and MSD under it. They had it on the strip (as part of them showing there work) I think it did like 9.8 at like 143.

jayyyw

Ryne Cunningham has a 500ci motor making over 700whp. Josh B. has a 454ci making 700whp with a Mamo MSD. Different dynos, huge price difference.

That HPR short block looks like the ticket, though.

jayyyw

Let me ask this, for a strictly 1/4mi / highway car, is it worth keeping the dry sump setup?

I don't know very much about stroker motors, but would there be any worry with nitrous or FI on top of this shortblock setup? Max rev limit? Compression ratio customizable?

nuke61

A 468 is enough cubes to do it, but it's intake manifold limited. The FAST must have been ported to within a hair of collapsing. I've read about a few 468" motors doing ~700 rwhp, but they were running sheet metal intakes and solid rollers.

Silver Bullet C6

I have been debating the same sort of 468 ci build for my Z06. I live near HPR and saw their 468 short block price, but after researching I figured a reasonable HP expectation with a plastic manifold was still about 660-ish WHP. Heads for a top HP build will not be cheap, solid roller likely needed, E85 conversion... it all adds up quick. I think a lot of people underestimate the importance of great heads in making HP, lots of attention on cam size and cubes which are important but if you can't get the air thru the heads....
And yes, just about all the Vettes I researched making about 700 whp had metal intakes popping thru their hood or a large cowl hood.

441LSXTT

My H/C/I ZO6 with stock short block LS7 makes 625rwhp. I also live in the Dallas area I see you live in Grand Prairie I live in Arlington. You are right that price is a very good deal and if I was guaranteed 700+ to me it would be worth it. I have 280ccc AI heads so I know they are good

Unreal

Yes AI 280s are good, but 700+rwhp NA good, I doubt it. You would want a big solid roller, some crazy heads, etc. Basically copy joshes setup with more cubes and RPM.