LS2 Block with 414ci?
 

Here it goes,

Started putting the peices together for my stroker. Just bought a LS2 block from Kris @ Scoogin Diggy and it's on the way.

I am going with a 4.125 stroke kit so it should have 414ci?

Doing research on a cam and etc. However, with 414ci, should I change the Injectors and fuel pump?

In regards to the Oil Pump, Whats a good brand of ported, High Flow Pumps?

Anyone had any problems with a LS1 Canton Oil Pan?

I'll have a complete LS1 with 21,000 miles and Auto tranny for sale next month (currently working in Italy). Then later the LS1 I pull from my TA. I am thinking of posting them on Ebay.

Thanks for any information,

David

Do yourself a favor and stick with a 4" stroke the 4.125 is too much it has a ton of TQ but absolutly no topend and no revs. Everyone I know that has done a 4.125 has redone it for a 4" and loves it. You will definatly need to upgrade the fuel pump and injectors. The stock ones are barely good for 450rwhp. As for the pump any good engine builder can do a ported pump. We sell them for $125. Have not seen any real problems with the Canton oil pan but have not seen any with the stock pan either.

Nate

Not only that (the revs), but a 4.125" stroke is going to send the rod/stroke ratio through the roof. What this translates to is severe side-loading of the pistons against the cylinder walls and MAD scuffing at higher revs. Just had a fellow builder call me today about having this happen on a motor they dyno'ed yesterday. That engine is now essentially seized.

I too was thinking 414 but because of the reasons above, I think a 404 would be your bet bet. I think you can only bore out to a 4.01" max on the aluminum and with the 4" stroke it would be nice.

Don't know if it would even be worth over boring for such little but, even if you didn't, an Aluminum 402 would still be better that an iron 408

Looks like plans are changing. I've been quoted a price on a 4" stroke kit for 2,150 + 250 for a balance, from stroker kits.com. They seem pretty knowledgable and not too far from Kansas City. Comes with a Scat crank. I have not inquired what the brand of rods and pistons are.

As for the Injectors and pump, What psi Injectors and what pump?

What percentage of increase does the ported pump have over the stock oil pump?

Thanks for the advice !

I didn't know Scat made an LS1 crank... Eagle's the only under-$1k crank I know of...

I don't have an LS2 block, but I went with the Eagle crank, Eagle H-beam rods with ARP L19 bolts, and Ross pistons. I spent under $2k on parts. ;)

Get the upgraded L19 rod bolts if they're an option for you. Worth the extra $80-$100.

If I were to do it over again, I'd probably go with 42# injectors, and go with the Racetronix in-tank pump setup (if it's offered for your car). I currently have 30# SVO injectors with the Racetronix setup, but have not had a wideband on the car yet.

As for ported pump, it's not really a 'percentage', what they do is to smooth the entry and exits of the pump, and then put a shim under the spring to allow more pressure before the bypass piston kicks open. Not a big deal to do. ;) It's worth it tho.

Although I agree with the sideload and oil burning arguements, that statement is somewhat false.

I've had my 4.125 stroke motor for 20k miles with the rev limiter anywhere from 7000-7200 rpm racing the piss out of it.

I am going with a bigger motor though and gonna use a 4" stroke this time to avoid the oil burning issues

The ZR1 guys love the 415" 4" bore 4.125" stroke and they spin over 7k rpm.

Wether it can rev that high or it makes power that high are 2 different things. Yes can get it to make some power that high but I have done several 4.125 and 4" stroke motors back to back in the same vehicles and the 4" make a ton more up top and runs better times. Yes the 4.125" has a ton of lowend but it does not outway the HP up top and the oil burning problems.

Nate

well i hope you are right cause I made 517rwhp with my 4.125" stroke.

Going with a bigger bore and a 4" stroke so it should make 540rwhp.

If I spent the extra dough to puch this thing out to 4.125, what kind of an hp increase would these extra 22 cubes make, I know many variables are in this equation.
Anyone done a 4.125 X 4.125? Of course an engine this large would stress everything to the max.
Is the Eagle crank O-K? Stroker kits in St Charles Mo. told me that there hard to balance or something of that nature.

I've been told the same thing"Eagle crank need alot of weight to balance" same thing with scat. I guess if you have a good machinist they'll be ok, but I've never balanced anything check book included(just keep writing the checks, when the blue letters come, deposit some money) :jest:

Ive had 8 eagle cranks 4.0" stroke balanced now, since they revamped the balance after the first batch, weve had no issues with needing an abnormal amount of weight to balance.

I would go with a 4 inch eagle assembly (crank and rods) and diamond custom pistons.

Should run its ass off :)

:cheers:

anyone need a set of brand new diamond 4.100" pistons? Let me know. Armen