Which motor is better for Turbo and stronger LS Integra or 420A?

[projectturbo99]

Both motors put out similar power. which one is better?

 

[Turbo 420a]

The Integra LS bottem end has been proven to handle 12psi, and reliably at that. So stock for stock, the Integra internals can handle more boost than the 420a. Even 10psi is considered pushing it with our 420a motor, but with proper fuel tuning I feel it's a safe setting. Compression ratio is relatively turbo friendly for both engines - with the LS at 9.2:1 and our 420a motor having 9.6:1.

 

[Kirby]

Well you have to ask yourself which turbo is safe at 12 psi on the integra? Is it the same T3/T4 that you run? Or are you talking 16G here? I don't have much experience with Honduuuuh motors but I know the one with lower compression will be more turbo friendly to start out. But I hear you have to sleve cilinders and what not with the honduuhs to run big boost. Stock for stock it's hard to say. The Honduuh could hold an extra pound or 2 of boost, but with 4 extra points of compression it might all end up even. Why do you ask?

 

[Turbo 420a]

I believe most of the turbocharged Integra LS's are using the DRAG kit, which uses the t3/t04 turbocharger in either B or E trim. I have only checked out a handfull of turbo'd LS's on the net but I haven't ever seen a 16g setup. There is also the more sparsely used GReddy kit which uses a td05h-18g turbocharger. Unsure of any other reputable kits. I also am not the biggest fan of Honda's, but I respect some things about them. They have some impressive small displacement naturally aspirated motors using the VTEC system. But for forced induction the most potent of their engines are too high in compression to be considered "turbo friendly".

Oh yeah I forgot to add that I read about the 12psi setting on quite a few threads a while back when I used to want a Honda (heh). Because of this I don't know firsthand if it's truly a safe boost setting. If your really curious, check out the Honda forums and see what people say about this now.

 

[projectturbo99]

the only reason i ask is because both motors are similar and i got a friend who has one and wants to turbo it.

 

[birdman]

Turbo integra ls's are capable of hitting high 12's low 13s with radials or slicks and a hondata ecu or stand alone of some sort properly tuned and thats with stock internals. and yes with 440s, afc and no fmu the ls block is proven to hold 12psi. most use t3/t4 turbos or bigger sometimes even 60-1

 

[prostreetdsmx1]

ok guys, i dealwith these little honda boys all day long and have gotten to know a little bit about them and the kits as i deal with drag quite abit. 12 psi on stock internals on a b18, noway! the kits that are made and sold are set to 6-8psi for a reason. it takes quite a bit of building to get into the bigger boost numbers and most of the turbo H's usea t3/t4 normally somethin in a 54+ trim for density atlow boost. even the GS-R and B-16 engines cant handle more than 10 psi or so and those that do cant do so for more than a few seconds. any one that would like to argue that can call up DRAG, Turbonetics or any of the other honda turbo people and they will tell you the same thing.

however from my experinces the LS is better than the 420A but i wouldnt say by too much. i think the 420A hasnt been explored enough, i think it has more potential than people credit it for.

 

[Turbo 420a]

really? I checked a few Honda forums and turbo-LS users were saying they were running 12psi, stock block w/tuning. There is a kid in my town with a green Integra SE (LS block) who used to run the t3/t4b at 11psi all day w/ a Hondata ECU without any problems.. his track times were in the low 14's-high 13's with the factory tires..

I can understand a turbo'd LS with an untuned fuel system having to stick around 7-8psi.. but with proper tuning, a lot is possible out of these two stock motors. I have ran 11psi after finishing my tuning, that was thought of as impossible a while back, birdman has done it to.. It's all about running high octane and having the proper fuel curve.

And of course GS-R and B-16 engines cant handle more than 10 psi.. 7psi IF that.. their compression is through the roof. That's the whole reason the LS block is way more formidable for turbocharging.. but what do I know, I just have a 420a.

Originally posted by prostreetdsmx1
ok guys, i dealwith these little honda boys all day long and have gotten to know a little bit about them and the kits as i deal with drag quite abit. 12 psi on stock internals on a b18, noway! the kits that are made and sold are set to 6-8psi for a reason. it takes quite a bit of building to get into the bigger boost numbers and most of the turbo H's usea t3/t4 normally somethin in a 54+ trim for density atlow boost. even the GS-R and B-16 engines cant handle more than 10 psi or so and those that do cant do so for more than a few seconds. any one that would like to argue that can call up DRAG, Turbonetics or any of the other honda turbo people and they will tell you the same thing.

however from my experinces the LS is better than the 420A but i wouldnt say by too much. i think the 420A hasnt been explored enough, i think it has more potential than people credit it for.

 

[birdman]

yeah seriously with fuel mods and proper tunning you can always increase the boost a bit just dont be scared. i run 94 octane and octane boost about every other tank yes is expenisive but if you can afford turbo you can buy good gas. honda guys are def running 12 psi on a lot of ls blocks and a tuned gsr at like 8psi with an ecu fully tuned are putting amost 260whp