Hey everyone, I've been reading posts on the site for about a week now and I have learned a lot, but there seems to be some controversy as to what is the easiest way to tune your prelude. The problem i keep hearing is that the stock ecu is not programmable. My prelude is a 2000 sh with 81000 miles on it.
I was thinking of doing a Obd2a (gsr) ecu swap, so i could be compatible with the hondata s100 or s300 system.
the main thing i'm trying to do here is
1. improve the hp of the car. Right now i have Unorthodox racing cams, a full exhaust with 4-2-1 headers, AEM CAI, and some others. I was told with the mods I have I should be making between 245-250 with a good tune.
2. If at all possible I would like to keep ATTS, I think its a great thing, but if it has to go, it has to go.
I would love to hear about other mods that would be worth the cost as well!
Getting 245-250 whp with just bolt-ons is completely unrealistic. A more realistic goal would be somewhere in the range of 170-180 whp with just bolt-ons and a tune.
If you want to tune your engine and keep ATTS, you don't have many options. The VAFC is the most common piggyback, but it will only allow you to change your air/fuel curves and VTEC engagement point.
Getting 245-250 whp with just bolt-ons is completely unrealistic. A more realistic goal would be somewhere in the range of 170-180 whp with just bolt-ons and a tune.
If you want to tune your engine and keep ATTS, you don't have many options. The VAFC is the most common piggyback, but it will only allow you to change your air/fuel curves and VTEC engagement point.
Yea i thought that was quite high too, maybe they were saying in the car, and not to the wheels.
I've read up a lot on the ATTS and, while some called it an engineering marvel, others were willing to sacrifice it for hp gains. I'm kind of undecided, but more hp would probably be more appealing to me for sure.
Yea the VAFC looks to be a decent unit, I just wish it allowed for more customization.
eh..I gave up my atts, hell im swappin in a base motor/tranny in a few months. Not like I take turns at 100mph anyway...
yea its too bad we cant have the best of both worlds, but it is what it is.
I talked to a guy in ohio and this is what i found out for those who are interested in doing something like this.
1. It is the obd1 gsr ecu that is compatible with the hondata s100 and s300 systems. That is the one you would need to buy for the prelude 97-01.
2. you will need a obd2a to obd1 harness (correct me if i'm wrong) to get the obd1 to fit your prelude.
3. You do not want to put in the gsr ecu unless you are going with a hondata system, because it is costly and dangerous without a tune.
4. You will, unfortunately, lose atts when you switch the ecu.
5. If you are going to turbo or supercharge your car, go with the s300 (495.00) system vs the s100 (195.00) system.
anyone know of a better system than this?
Last edited by acronkright; 03-25-2010 at 12:19 PM.
First, you'll make more HP if you replace your crap header. I know it's crap so don't deny it.
Second, you cannot replace the ECU and keep ATTS.
Third, tuning with a piggyback does have its limits, but all piggybacks are not created equal.
Fourth, make sure you aren't under the impression that ATTS only helps when turning at triple-digit speeds.
Quote:
Originally Posted by pIERCE
So what is the "most tuneable" piggyback called?
AEM F/IC followed by Greddy eManage followed by others and finally you come to AFC Neo, VAFCII, VAFC, SAFC.
__________________
1988 Prelude S - victim of an 80mph backflip
1991 Prelude Si - sold
1989 Accord DX - impounded
1998 Prelude SH - totaled on 3/29/12
2006 CRF150F - sold
2006 YZ250F - sold
lol you make it sound like your just gonna grab a black can of spray paint and paint your cover with it still on the car...I really hope thats not what you plan on doing....hytech replica ftw unless you wanna spend a ridiculous amount on a header for a car thats ten years old and losing value every day...
Was this your attempt at denying it? LOL. I told you not to do that. Like already stated, the DC Sports header (SS or Ceramic) is nearly identical to OEM specs. Unbiased dyno tests showed it to gain 1-2whp over stock, however, that could have just been due to other variables. If you want a good copy cat, then get the best bang for your buck.
You'll also want a 2.5+" exhaust system on the car (not just a catback and not stock size). Otherwise, purchasing a performance header is almost pointless.
__________________
1988 Prelude S - victim of an 80mph backflip
1991 Prelude Si - sold
1989 Accord DX - impounded
1998 Prelude SH - totaled on 3/29/12
2006 CRF150F - sold
2006 YZ250F - sold
Last edited by Kronn 98SH; 03-25-2010 at 09:32 PM.
Was this your attempt at denying it? LOL. I told you not to do that.
hahaha no no i was just showing you guys what i had. It always helps me when i can see pics. If anything, i was agreeing with you. I didnt put the headers on but i did find these on ebay, i hope they are still there in a week or so.
hahaha no no i was just showing you guys what i had. It always helps me when i can see pics. If anything, i was agreeing with you. I didnt put the headers on but i did find these on ebay, i hope they are still there in a week or so.
Do yourself a HUGE favor and read the link I took the time of posting just for you. I'll wait for a PM.
__________________
1988 Prelude S - victim of an 80mph backflip
1991 Prelude Si - sold
1989 Accord DX - impounded
1998 Prelude SH - totaled on 3/29/12
2006 CRF150F - sold
2006 YZ250F - sold
isnt the jdm type s ecu obd1? couldnt that be chipped and used to retain atts function? or am i missing something? like the software simply doesnt support atts regardless of obd
__________________
David
01 SSM SH
93 d15 auto del slo gone and FORGOTTENexcept for a few memories....
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