OK, my plans are taking a drastic turn, for the better, just a little longer, time wise.

For those not familiar with my situation, I recently had to decide if I was going to build the engine in my car, or build the one my dad has sitting in the garage and swap them when I'm happy with it.

I had decided that I was going to build the engine in my car, but I have changed my mind.

I am going to install my heads and cam and intake onto the engine in the shop, then swap later, when I get it like i want it.

I am also seriously considering a stroker, and that is the point of my topic.

Has anyone built a 400 inch LS1??? Is it even possible?

I would really like to have something bigger than 382", but I don't have the money for the 422" motors.

What are my options for something falling between the two??

Thanks in advance guys, I know y'all will come through again!!!!

Taco

 

Yes, you can build a 400 ci motor with a resleeved aluminum block with a 4.150" bore and a stock crank that has been offset ground from 3.62" up to 3.70" inches.

http://www.web-cars.com/math/displacement.html

 

Tony,

What about pistons, are there any special requirements for the LS1 piston-wise???

what about rods, any need in unpgrading if I plan on staying all motor???

I will likely stay all motor, since I don't really believe in N20, and I can't swing a SC or Turbo setup money wise.

Thanks again, you are the greatest!!!
Taco

 

Also, would the C5R block even be worth considering in my situation???

I expect not, since it would be somewhat over kill, and also would weigh more anyway, but I thought I'd ask anyway

Also, how hard is it to resleeve the LS1 block?

Sould a shop that build mainly BBC race engines be able to do this????

I sure do hope so!

Thanks again Tony!
Taco

 

You will need custom pistons. Off the shelf old style pistons will not work. They have different valve relief locations.

No point in getting the C5R block. If you want to spend some money then go ahead and do a 422. BTW, I don't think the C5R block would be a whole lot heavier. It too is aluminum. Still, no point in you doing it.

Resleeving these blocks is tricky. No way in hell I'd let anyone attempt it that isn't WELL proven in doing so...like MTI is.

[ February 21, 2002: Message edited by: Colonel ]</p>

 

OK, good good good, thanks so much guys!!!

Where to get LS1 "four-one-fifty" pistons???

Any advice on Rods???

What about a 3.700 crank???

Please don't tell me that's stock, I'll feel really silly!

I guess I would have to send my block to MTI/ARE/etc. then, right???

Hope not, but will if I have to!

Thanks again guys!
Taco

 

Hey Taco

Check this thread out. <img src="gr_stretch.gif" border="0">

https://ls1tech.com/ubb/cgi-bin/ulti...&f=10&t=000293

Johnnie

 

OK, I'm gonna have to rethink my plans here.

I don't, and probably won't have that money to throw around anytime soon, so how big can you bore a stock block???

How much would it cost if I sent MY block to have resleeved???

Surely less than $2,300!?!?!?!

Hopefully so..... keep the help coming guys!!!

Thanks,
Taco

 

Also, while I'm thinkin about it, about how much HP should I expect from a 400" motor with good ported heads (300 cfm @ .550 Lift) and my cam, specs are .221/.221 .558/.558 on a 114 deg. LSA???

What about CR, should I leave it about the same or bump it up some, since i have no plans of spray or Boost.

Thanks guys, sorry so many ?'s

Taco

 

I also would not trust a shop with no LS1 resleeving experience. Seems like only ARE and MTI are doing this successfully as of now.

I believe Nick quoted $2300 for a resleeved block, but I'm not sure if he can take his sleeves out to 4.150" or not. MTI is currently building me a 4.150" bore sleeved motor.

Stock crank is 3.62" stroke, but you can have the rod journals offset ground a bit to get 3.70" stroke. ARE can handle that for you, as they have done this quite a few times for people.

Yes, custom pistons are required. LS1s use a specific piston for right and left hand sides of the motor due to the valve arrangments. Most custom piston manufacturers can build you any piston you desire, as long as you give them the specs and tolerances you want. JE, Lunati, Ross, etc... can build pistons to spec.

As for billet rods, those would be custom also. You need to know what size rod journal you will end up with if you get the crank ofset ground, and whoever does the grind on it will supply that info. I'd suggest getting the crank worked first, that way you can spec out your bearings and rods, along with the pistons.

Tony

 

OK, back for another day of it!!!

First order of Business, re-sleeving the block I have. Any prices???

Compression. How high should i go and still be daily driveable, with really no possibility of spray or boost.

I'm also still looking for the best bang-for-the-buck stroker ideas. Like I said, I would love to go bigger than 383, but I don't have the money for a 422, so something in the middle, 396, 402, whatever, something around that.

Thanks again guys!!!
Taco

 

yeah, I want to know how much to have my own block resleeved. I have machining experience, but that's not something I want to try doing myself. <img src="gr_sad.gif" border="0">

 

Resleeving these blocks is not easy and there are VERY few people in the entire country that can do it successfully. If you want it done right you will have to pay what they charge to do it. If you try to do it yourself or get someone unproven to do it you are almost certainly in for a world of expense, aggrevation, and disapointment. There are reasons why it costs so much and reasons why there are so few doing it right.

How big can you bore the stock sleeves? It depends on the year but it is practically none. For big CIs you will have to resleeve the block.

C/R for daily driving? There has recently been a thread about that and there is no simple answer. It depends on SO many things! Generally, 10.5:1 and you're plenty safe on 93 octane. With all of the right conditions you might get away with 12:1. For an average everyday street driven car I wouldn't go much over 11:1.

 

I know it's not gonna be cheap, I'm ready for that, but I just want to know how "not cheap" it's gonna be.

I was figuring on about 11.5 to be slightly pushing it, but I can live with 11.0 no prob.

Thanks colonel!!!!
Taco

 

I would definitely NOT go with any shops that do not have experience resleeving LS1 blocks. One bad slip of the machining equipment and your block is junked. Better keep some spare cores handy, and hope that shop isn't just welding up damaged goods.

The custom sleeves themselves cost around $500-600 easily. The machining labor can easily reach $100+ per cylinder. Then the shops still have to make a profit if they want to stay in business. <img src="gr_images/icons/wink.gif" border="0">

I know MTI will not sell any bare sleeved blocks right now, but they can put together some all-bore shortblocks. The waiting list for these resleeved blocks is LONG. Try 2 months minimum.

Tony