VmtSquad

iTrader: (1)

Hey guys,

I've been searching a lot these days on our J32a3 (04-06) engines and seems like there's a lot of mis-information and bullshit around so I decided to start a thread, and hope that one of you guys join in.

So here I am, ready to start my new project with my 04TL 6speed. Me in my room mate, who is a good honda/acura performance mechanic, want to build a forged J32 so it can holds some Nitrous shots.

I've been searching for some forged pistons, but couldn't get enough good information so I had to ask the pros.

So, what's the best option in terms of pistons & cams?

I know TypeS(j35) cams and heads could be used onto our J32 but changing the head won't raise the compression ratio if I'm right...

I'm pretty sure there's a thread on azine showing the pistons options, but couldn't find it with numerous search...if I missed it could someone be kind and post it here.

Anyway, I hope you guys can share your experience and maybe help me learn what I need to do to get this project going.

Thanks guys!

libert69

iTrader: (7)

the only off the shelf pistons/rods ive come across on a website for the j32 is from kms
http://www.honda-performance.com/info-lv2.asp?id=366
http://www.honda-performance.com/info-lv2.asp?id=254

ive never seen anyone on this forum use kms pistons though. eagle rods are a good name but you can go with pauter rods for less money (1290$) and pauter has a few sets of rods for the j32 (and possibly the j35) sitting on the shelf. I should know since I sent them a j32 rod to get measurements and make me a set.

But you didnt mention wanting rods. I have wiseco pistons at 9:1. IIRC they were 1100ish. You could order from any major rod/piston manufacture as long as you give them the specs for you want.

j35 cams arent anything special and if you want aggressive go with custom from bisimoto

type-s heads are decent upgrade over base. they flow quite a bit more cfm. I have the type-s heads/cams but only b.c i got a pair for 650$ new

If your talking forged then might as well get a forged crank. youll need the one from the 04 mdx

everyone is going to tell you that if your upgrading your pistons then you might as well do the rods bc the "rods" are the weak link. Maybe so. But remember that there is a turbo tl running wiseco pistons and stock rods making 500whp for over 25000 miles trouble free.

VmtSquad

iTrader: (1)

Hey thanks for the reply. That's some very useful info.

You're right I didn't mention rods since my mechanic told me that the pistons and cams should be enough for our project. He also mentioned that we could get the heads ported, but that would increase the total price for sure.

If I understand, there's nothing about using the J35 pistons from an RL or TypeS(07-08) ?

Here's the status so far:

I already have a J32a3 (2005) ready to be sent to the machine shop. I could also get my hands on a J35 but I would need to know from which YEAR and model. You were talkin about the 04 MDX. Again my question is why can't we get the crank/parts from a TypeS?

Thanks again libert69, I really appreciate !

callahan

https://acurazine.com/forums/showthr...=749155&page=3

Theres alot of good info in there.

bouncer07

I need some more information on what your aim is going to be. Will it be 150 or 100 shot? How much horsepower you will want? Is this drag?

If your goal is to go nitrious, forged is the way to go. No matter the level of hit if it's going to be something used on a regular basis a nitrous specific ring pack would be highly suggested. NO matter how much you run you DO want to gap any ring pack according to the nitrous specifications. All the gap information will be included with the rings and pistons. Even on a 150 shot unless gapped correctly they can and likely will butt and your day is over.

I would not cheap out on the materials.

If one had to be on a budget,

J37 forged crank
J37 forged rods
05 RL forged pistons and rings
J37 OE bearings
J32A3 gaskets
ported intake runners and intake

All this for N/A + nitrous, is it worth your hard earn cash?

VmtSquad

iTrader: (1)

^^ I was looking at using 75 shots at the beginning and get some dyno sheets. but that's the LAST step of that project...

So my friend and I are looking at close to 300whp N/A and close to 400whp with some nitrous shots

First step is to know what could fit and which setup would be best. Since there's not a lot of user on here that went that route it's kind of hard to know what's the best setup.

I found the Bisimoto cams and seems like JE is making forged pistons for our J32a3 engines.

We are currently looking to use custom forged pistons and rings. As I was reading the J32a3 stock crank will be able to old the shots pretty good.

When you're talking about the J37, are you talking about the parts that comes from the 3.7 it self or some aftermarket forged ones? Same questions for the 05RL forged pistons. The RL pistons are not forged as I was reading..thats seems to be a miss-info.

Thanks for you reply!

G*LUVA

iTrader: (1)

sub'd

Hi speed

iTrader: (3)

I would like to do a semi low compression (10:1) build using most stock internals with forged pistons.

thisaznboi88

iTrader: (7)

Oem acura parts are forged for lightweight not for strength. So don't think you can get oem forge piston and run tons of boost. Go aftermarket.

04TL4P3

iTrader: (1)

Has anyone done a high compression all motor build? Whats the stock compression on the base and type s?

libert69

iTrader: (7)

Do it. Then boost the hell outa it

Hi speed

iTrader: (3)

I need to look into what rods and crank I need to lower the compression a full point. Maybe dished pistons?

VmtSquad

iTrader: (1)

Where did you get those?

The compression level is a good question what's the stock compression level for the J32a3 ?

Thanks!

VmtSquad

iTrader: (1)

Another question is poping out regarding the heads. Port and polish is no question. The real question is would the J32a2 Heads fit our J32a3? The reason why I ask this, is that the a2 head don't have a cast exhaust manifold like the a3. So we could install so real manifold and do a real 2.5/3'' exhaust.

Here's a small update so far:

- Will more likely order Bisimoto Level2 Cams
- Currently checking the price to get both heads ported
- I'm still looking to find some good aftermarket forged Pistons and rods.

I will update on prices and parts that I find!

Thanks again guys and keep the help coming !

05_NBP_TL

iTrader: (1)

Sub'd

libert69

iTrader: (7)

if you change the crank to the j37 for example, then youll need to change the rods(obviously) and get pistons made to a whatever compression you want based on the new rod specs.

i know rodney is running 10:1 wiseco pistons with the stock 04 crank and stock 04 rods daily driven at 500whp for 1000s of miles trouble free

i stuck with the 04 crank, had pauter make rods to the oem specs for the 04 and just changed the pistons to get me to 9:1

i had the pistons made first which were made to 9:1(kind of a mistake) based off the 04 crank and 04 rods. i was just planning on doing pistons ONLY. then i figured might as well do the rods since im in there. I had the rods made to 04 specs. then i started looking into the j37 crank for more displacement down the line. I still could of used the j37 crank with the new pistons but i it would of raised the compression over 10:1 bc the j37 rods are longer

from my understanding, dished pistons will lower compression but i dont know much about them

these pistons are from wiseco. I get a little piston slap on cold starts but its completely normal. After the car is warm and the pistons swell it goes away. It doesnt bother me but some people might not like it. Ive read that a heavier weight oil can reduce the noise quite a bit

stock compression for j32a3 is 11:1

Hi speed

iTrader: (3)

I didn't realize Rodney was able to lower compression by a full point with just pistons, that sounds like it might be the direction I want to go here soon. The extra displacement would be fun and I would like to atleast get to a more boost friendly comp ratio.

GtMaxx

Im waiting for this answer as well as I would like to build a nice high compression j3?a lol as we know there are some fast high compression cars spanking up the turbo world. This thread is going to become very useful but im waiting and following this thread as I plan come spring time to pay rodney a visit for some comparisons on a nicely built high compression setup or S/c

VmtSquad

iTrader: (1)

@libert69 Thank you very much for sharing this with us. Your post is really interesting, especially when you speak about piston slap. Could we prevent this by using J35 forged pistons/rods? I will have to ask my boy about this.

Besides that, it is clearly a step forward!

@libert69Have you played with the heads in some way? I'm looking to go port and polish, but I want to get the opinion of guys like you who have experience with the Jseries.

Talking about the heads, same question from my last post is still on: would the J32a2 Heads fit our J32a3? The reason why I ask this, is that the a2 head don't have a cast exhaust manifold like the a3. So we could install some real manifold and do a real 2.5/3'' exhaust.

Thanks guys!

callahan

Not sure, I thought I remember reading something about it j32a2 heads on j32a3. I'll c if i can find the form.

Cj002

What a great thread! I've learned a lot so far. I am very new to this, but I love it so far! I just bought my first set of wheels...EVER!!!

justnspace

iTrader: (1)

^the fuck does that have to do anything with pistons and engines and rods and turbos???????

FamilyGuy

It's made out of metal ?

TacoBello

They're all car parts

screaminz28

iTrader: (1)

They're both round?

NSXCessive

Just blew the rings on my '05 TL CTSC. Apparently the comptech exhaust canisters clogged themselves shut pressure had no where else to go but the weakest link. Glad I caught it right away torn motor down no damage to cylinder walls a quick hone will fix those.

Can any suggest anything that can be bought off the shelf in terms of pistons and rings? I've check Wiseco website couldn't find anything or J32A3 would like to maybe go 10:1 but I'm still limited by Comptech ACM so no tune-ability.

screaminz28

iTrader: (1)

This thread has a lot of good info on the pistons - https://acurazine.com/forums/perform...bility-913726/

If you're running the HBP, I'd suggest even going lower than 10:1 - I know you're an Auto so no Hondata, but what about using an MS3/JnR ecu?

Looks like you've had the blower since at least 2012 - any issues prior to now? How much power was it making?

NSXCessive

Ran the CTSC for a few years and no not running the HBP I'm running the normal one shipped with the kit. Yes '05 Auto no Hondata which is a real bummer. I did pick up and FI/C but could not getting it working properly and didn't want to tinker too much with standalone as I need the car to pass ODB2 port testing emissions here in Canada. It made over 288rwph on stock pulley my last pass on the dyno that was until the clogged CT exhaust aided in the blowing of my piston rings.