Any problem with downpipe only mod?
 

I'd like to replace the entire exhaust system eventually but the money is only going to allow me to do things one at a time. Right now I am completely stock. Second owner of a 94 auto FD that was most likely babied and probably has significant carbon build up. I had an ATF treatment done, can't tell if its helped or not. I'd like to put a downpipe on next but wonder whether with the stock cat and catback on there I run the risk of clogging them with the increased flow from putting on a downpipe? Would I be better off putting a midpipe on there till I could afford a high flow cat? It won't have to pass a state inspection for another 10 months and I could keep the stock cat on hand for that purpose;)

you'll be fine

Put on a DP, leave off the midpipe until you can afford the HF.

My suggestion.

It is very important to remember that after 2 mods you should look to get a aftermarke ECU, with only a downpipe and a intake you are OK but, midpipe and catback should be installed after the ECU is changed/remaped..., another good thing to do is to get a boost controler to keep the boost @ 10psi.
Better be safe than sorry.

When you can afford it, I'd pick up a boost gauge. I know with a down pipe and a Racing beat intake, I was boosting to 11psi and spikes to 14+psi. :eek: Later, CJ

CJ, any particular boost gauge you would recommend?
 

I know that Autometer is supposed to be good, but there are so many different models I'm not sure which one to get.

just get the autometer with the black face with white/yellow letters. it looks like a factory gauge. check it out at rx7store.net. or check out the peter farrel gauge. matches stock realy nice too.

I suggest the Autometer #1472, or any other black face / chrome border gauge to match stock. Shop around (Google) you'll find prices vary widely.

Dave

defi "D" series matches interor lights perfectly

Yeah, but try finding a set of those in stock anywhere! I pre-ordered some and from what I hear, I'll be getting 'em oh sometime in February. :(

http://www.ddearborn.net/images/rx7/defi-dgauges.jpg

thats what i hear, but they are worth the wait

Um....I'd suggest getting GOOD gauges...not gauges that match the interior. The BF series from Defi is great at night...AND they have a record/playback feature as well as a peak feature. Something that the "matching" gauges don't have.

the defi "D" series doesnt have the fancy features like the BF series, but they are very good gauges. defi is a quailty company. ive heard otherwise about places like autometer. but then again thats just what i heard

I have ordered the defi from rx7store since beg Nov....still waiting