usmcpony

As the machining to my block is coming to a end. I've been thinking about what size motor I should go with. Right now my block is set to be a ERL 427CI 6 Bolt block. After watching alot of videos of 1200rwhp+ corvette online. I've noticed alot are using a 434ci. My friends 1500+hp Vengeance Racing's TTZ06 has a 440ci, Redline Motorsports white 7 second TTZ06 has a 432ci and I've seen a couple 454ci. I'm going with All Pro 12-1 heads, 2200r supercharger, 2.75" pulley and E85. Opinions would be appreciated.

White_Lightning

i made 1461 on a 427... dont punch it out just to punch it out.

C6 Curtis

If you can I would do a 440ci that's what I'm building. No need to stroke it. Big bore 4.185 pistons and stock stroke crank. Higher compression height on the Pistons and squeeze a longer rod in there so it can rev high.


-Curtis

ajrothm

You will gain nothing from 7 extra cubic inches except thinner cylinder walls and less available rebuilds from that block. Leave it 427

427ZM

Truth. Especially true when going FI. Going ERL you'll have a good bottom end, add decent heads and you're on your way to big power.

C6 Curtis

Lol just do a 376ci then

schpenxel

305!

C6 Curtis

Yup the thicker the walls the better!

neverstop

if you punch it out more than no meat left in the cylinders for if/when you blow something up. you'll need a new block then at that point.

honestly I don't know that the displacement really matters on this big power FI builds. I know different motors but lots of guys running 1,500+ whp on 3.0 2jz motors reliably and running huge mph and solid ET inb 3400lbs cars. If I were building from scratch I'd probably just do a 370ci so the pistons don't come out the bottom of the sleeves for more structural block integrity and then just add more boost.

just my $0.02

yur2slo

I'm doing a 400ci with 3.75 stroke for more piston stability and just keeping 4.125 bore to run better heads. Twin 83mm turbos spinning to 9,000rpm, with that motor recommendation coming from LME (who is building it) so I'm sure they know what they're talking about.

If you need to make up the small amount of displacement, bump up the boost instead would be my recommendation.

Also, like mentioned above, if some motor work is needed in the future, keeping the stock bore now gives you room to grow without buying a whole new setup.

Detoxx03

Only if you want to sound cool when you tell people what it is. Other than that it makes no sense. Actually it makes no sense at all

neverstop

this setup sounds incredible. I'd happily trade more rpm for some decreased torque on my build also.

Pitufina

Are you planning to make a thread about your car? Sounds like it's going to be a beast.

schpenxel

9K RPM's

lt1z

I would just stay away from longer then 4.00 stroke and keep as much meat in the liner as possible for boost. 427 makes sense for that.

usmcpony

I'm most likely going to stay 427ci. Just thinking out loud. I definitely want more strength so thinning out the liners doesn't make much sense.

yur2slo

Once all the parts are in I will start a thread. Have a FB page going on it as well - https://www.facebook.com/TheSonicDoom/

Pitufina

I don't have FB but I was able to see what you got going on. I'll be looking forward for your thread. Thanks and good luck with everything!

old motorhead

Just to put things in perspective, a 400 cid engine at 7K rpm is moving about the same amount of air as a 427 cid at 6500 rpm. I think your "limits" are more related to the blower chosen rather than the cubic inches you're using.

I'd rather shorten the stoke up a little and have a happier bottom end.

usmcpony

Are you saying the 2200r isn't going to be enough?