ls turbo setup [Archive]

inspecta83

10-29-2002, 11:57 AM

im putting an Ls into my crx and the set up i am going to go with is...

eagle rods
roller wave pistons
blockguard (either nuformz or golden eagle)
hondata 2b
ferrera valves (only b/c my stock ones are damaged)
portflow valve springs
rc injectors
drag 3 turbo kit

thats the basic setup that i am aiming for but i wanted to know what yall thought about boring out the motor to a 2.0 liter? i was told that doing this will yield good hp gains and i just wanted a 2nd opinion...are the advantages of boring to a 2.0 worth the cost?

also, i know by boring out the motor i'd have to get bigger diameter pistons (84mm), and just wanted to know based on the list above, what other things i'd have to do if i should decide to bore out the motor (i.e. different sized blockguard, bigger injectors, etc)? thanks

2ndGenTeg

10-29-2002, 04:00 PM

If you're going to bore it, go ahead and sleeve it, too. You'll be able to run more boost and it will be safer for the engine.

inspecta83

10-29-2002, 06:55 PM

i just realized that if i bore it out that i'd have to re-sleeve and doing both of those now would put me over budget. so for now im just gunna stick w/ the setup posted above...thanks

ebpda9

10-29-2002, 10:32 PM

i don't know where i read that before but i heard of a dude who had his engine bored out to 2.0 and he was blowing head gaskets like hell. didn't you 2ndgenteg mentioned it before ?

2ndGenTeg

10-30-2002, 12:34 AM

If you bore out any engine, I recommend a thick head gasket. When you bore cylinders, the space between the cylinders becomes very thin. Using a thick head gasket makes the head gasket much stronger at the spaces between the cylinders. In addition, the resulting lowered compression ratio allows you to run more boost.

If you're going to delay boring and sleeving, I at least recommend a block guard, but be forewarned that a block guard is in no way an adequate alternative to sleeving. The good news? A good buddy of mine is running with just rods, pistons, and a block guard- and 18 psi.

delsolvtec

10-30-2002, 11:15 AM

If you are going with a drag kit you should think about using low compression pistons, total seal rings and a 2mm head gasket from greddy to lower compression even further. The higher the compression the more risk of dammaging the engine. You can get arias pistons for around 400$, and total seal rings for about 100$, it might sound expensive but it'll save you a lot of trouble in the long run.

inspecta83

10-30-2002, 11:18 AM

thats very encouraging 2ndgenteg...i know that a blockguard isnt as good as re-sleeving however i am only going to be running about 12psi which i was told is just fine with a blockguard rather than re-sleeving.

i am going to be using a golden eagle blockguard (along w/ all the other goodies i listed above) @ only about 12psi, so according to your friend's setup, i should be good.

ebpda9

10-30-2002, 01:27 PM

what is a block guard ?

Dr Drew

10-30-2002, 01:39 PM

delsolvtec

10-30-2002, 02:50 PM

I ran my motor with 10psi on stock pistons and rings for about a month. Then the car started to burn oil. Pulled the motor apart to find that the pistons were cracked and the rings were shot. If you are going to run anything over 7psi I would highly recommend upgrading your pistons and rings.

2ndGenTeg

10-30-2002, 04:30 PM

A block guard is inserted into the top of the block. It occupies the gap between the cylinder walls and the block and reduces the flexing of the cylinders under load.

http://www.inlinefour.com/lib/twincamtech/blockguard.jpg

inspecta83

10-30-2002, 10:27 PM

how does the s200 compare to the 2b? and for my application (listed above), are the advantages of getting the s200 instead of the 2b be worth the extra money? (im not planning on boosting more than 12psi)

Dr Drew

10-30-2002, 10:41 PM

Originally posted by delsolvtec
I ran my motor with 10psi on stock pistons and rings for about a month. Then the car started to burn oil. Pulled the motor apart to find that the pistons were cracked and the rings were shot. If you are going to run anything over 7psi I would highly recommend upgrading your pistons and rings.

D Series compaired to a B Series is huge differance. I wouldn't run anymore than 7lbs on a single cam.

delsolvtec

10-30-2002, 11:06 PM

Originally posted by Dr Drew
D Series compaired to a B Series is huge differance. I wouldn't run anymore than 7lbs on a single cam.

That reinforced single cam is now running 10lbs without problem. It's all in the tuning. Any high mileage engine is going to suffer the concequences of turbocharging if you don't replace parts that are prone to go under boost. 12lbs is a lot of boost for a motor that was designed to be naturally aspirated. Lower your compression if you want the motor to be reliable, if not then that's fine too, just don't expect it to last very long.

thermal

10-31-2002, 12:43 PM

Originally posted by inspecta83
im putting an Ls into my crx and the set up i am going to go with is...
eagle rods
roller wave pistons
blockguard (either nuformz or golden eagle)
hondata 2b
ferrera valves (only b/c my stock ones are damaged)
portflow valve springs
rc injectors
drag 3 turbo kit

..just wondering, what size injectors are you planning on getting? just a reminder, u can get 450cc DSM injectors real cheap. i bought mine for $23.75 from a junkyard and a $3 resistor box. it will be balanced and cleaned for about $50. my opinion on your set-up is simply.....going to kickass! i've seen an LS t3/t4 hybrid turbo boosting about 15 psi and ran a consistent 13's......semi tuned. :yes:

inspecta83

10-31-2002, 03:07 PM

im not sure what size injectors im getting but i was thinking that 450cc would probably be an overkill. does anyone have an answer to my previous post?

how does the s200 compare to the 2b? and for my application (listed above), are the advantages of getting the s200 instead of the 2b be worth the extra money? (im not planning on boosting more than 12psi)

thanks

Dr Drew

11-01-2002, 07:51 AM

I'm pretty sure the S200 is a replacement for anything lower than stage 4. Here is a link to a fuel injector worksheet (http://www.rceng.com/technical.htm) Just type in what your WHP 'goal' is and it'll calculate what size injector are needed.

inspecta83

11-01-2002, 08:50 AM

what site was that worksheet on b/c the link isnt working. thanks

Dr Drew

11-01-2002, 11:53 AM

Sorry about that...dont know what happened. try it again.

inspecta83

11-01-2002, 04:27 PM

it works now and i used it but i think that eqation is all screwed up b/c i dont think i should use 500cc injectors b/c that would be an overkill for a turbo'd ls for 250whp. someone told me that the magazine "sport compact" had an equation that's pretty accurate. hopefully i can get my hands on it

Dr Drew

11-01-2002, 06:43 PM

That is rated at 80 duty cycle, honda injectors run about 85-90%. That is why it says a little higher. If I were you...I'd go with what they say. There are a lot of tuing issues if you max out the injectors.