Next mod poll

[90AWDTalon]

I'm having a hard time deciding what mod to do next. I'm stuck between downpipe and GM MAF translator. I was planning on doing the MAF next, but I got my exhaust done yesterday and didn't get the results I was hoping for. Seems like the downpipe is a large restriction.

My current mods are,
Hacked maf
K&N filter
Ported 16g turbo @ 15psi
Ported EVO exhaust manifold
3" cat
3" custom catback
Walbro 255
Boost gauge
Pocketlogger should be on the way but I don't have one yet.

So I got the exhaust done yesterday, made noticable power but not what I was expecting. Really need to get the downpipe done. I was planning on doing the GM MAF next, until I realized the downpipe was a big restriction. Then this morning I was getting fuel cut at about 6K rpm's in 1st, 2nd, and 3rd gear. It was in the mid 50's temp wise, I haven't gotten any fuel cut in the afternoon, about mid 70's temp wise. Now I'm thinking of going with my original idea of the GM MAF to get rid of the fuel cut.

So what do you guys think? It'll be atleast a month or two, maybe more, before I can do any more mods after which ever one of these I end up going with.

 

[alex99gst]

i would go with an O2 eliminator downpipe if you want more power. but if you want to get rid of fuel cut, the GM MAF would be good. I would get both

 

[vlaar]

The problem with the exhaust is your cat. High flow cats are a bunch of crap. Ask most guys running 12's or faster and most are running straight pipes--no cats. I know when I got my 2.5inch testpipe (downpipe and catback stilll stock) installed, I began spininng tires. Definitely gave me some great power I can't wait to get my 3 inch downpipe though from RNR racing. Should be getting it next week

 

[90AWDTalon]

More opinion's please.

 

[headrec*]

HARD TO SAY. I would have to say get a 2G MAS for cheap and get the downpipe. I think that would be your best bet.

 

[90AWDTalon]

Well I've decided to go against what most people have voted and go with the MAF translator. I decided that I wanted the tunnability and the quicker spool of the MAF, even if it won't make as much power. I hope to get the downpipe in about a month. I was thinking about ordering an upgraded compresor outlet pipe at the same time. Is this a worth while upgrade, or would I be better off saving my money for something else.

 

[Blk_99gst]

Originally posted by 90AWDTalon
Well I've decided to go against what most people have voted and go with the MAF translator. I decided that I wanted the tunnability and the quicker spool of the MAF, even if it won't make as much power. I hope to get the downpipe in about a month. I was thinking about ordering an upgraded compresor outlet pipe at the same time. Is this a worth while upgrade, or would I be better off saving my money for something else.

I think you need to follow the upgrade path and do the downpipe and save the gm maf for a much later time, almost next to last or before you get bigger fuel injectors. You say your getting the maf for quicker spool; but the reason most people are seeing quicker spool with the maf is because they have already gotten rid of all the other intake and exhaust restrictions. You might see some help with spool, but the 1g o2 sensor housing is very small, then mate that to the stock downpipe and then a high flow cat; that's pretty bad. You would see a big increase in spool and POWER if you got a better o2 housing, a 2.5" to 3" downpipe, and got a 3" test pipe. Those mods would give you a LOT more than the maf will.

Pluse the maf is still on a 2-3 week wait list. You can get the downpipe and other go fast parts a lot sooner. Change your mind and don't get the maf yet...

 

[NewB2dsm]

The problem with the exhaust is your cat. High flow cats are a bunch of crap. Ask most guys running 12's or faster and most are running straight pipes--no cats.

Actually iv heard different. There is a guy by the name of mark lang and jeff lang that has a gsx with a highflow cat. He ran a 11.778 @119 and i ws talking with them and they said that they ran a testpipe for a while and then when they went to the track a few times they had the highflow cat in and it ran the same times no change or anything. He said the only problem is there are not going to like race gas. This is from the guy who's shop is speed desing, they make the 4 spiders diffs for our cars that he sells and what tre puts in their trannies.

 

[Blk_99gst]

Originally posted by NewB2dsm


Actually iv heard different. There is a guy by the name of mark lang and jeff lang that has a gsx with a highflow cat. He ran a 11.778 @119 and i ws talking with them and they said that they ran a testpipe for a while and then when they went to the track a few times they had the highflow cat in and it ran the same times no change or anything. He said the only problem is there are not going to like race gas. This is from the guy who's shop is speed desing, they make the 4 spiders diffs for our cars that he sells and what tre puts in their trannies.

O.K, that's one guy and one car. I double dog dare you to do a poll on here and ask people who have used both and see what people say as to which is better. I can tell a big difference when I swap out my 3" test pipe and put a 3" high flow cat in there.

It's just proven, the best exhaust for a turbo is no exhaust. That's why there are o2 dumps, to get the exhaust out of there faster. That's why 3" exhaust is better than 2.5", more room to get more gas out. So a test pipe that's straight through is better for flow than a cat that has multiple screens in it; just not good for getting the exhaust gases out quick.

EDIT - O.K, actually to add something. In the past I could tell a huge difference between the testpipe and cat because I was not o2 dumping. The difference was the exhaust gases had no where to go up top; they were still being choked by the cat. Now I have an o2 dump housing and the difference between between tp and cat is not so great, because the majority of the gases get dumped to the atmos before the cat. I'll bet you five bucks that your 11sec shop owning friend is running an o2 dump setup, and that's why he's not seeing a huge difference between tp and cat! D@mn I'm good...

 

[90AWDTalon]

Originally posted by Blk_99gst


I think you need to follow the upgrade path and do the downpipe and save the gm maf for a much later time, almost next to last or before you get bigger fuel injectors. You say your getting the maf for quicker spool; but the reason most people are seeing quicker spool with the maf is because they have already gotten rid of all the other intake and exhaust restrictions. You might see some help with spool, but the 1g o2 sensor housing is very small, then mate that to the stock downpipe and then a high flow cat; that's pretty bad. You would see a big increase in spool and POWER if you got a better o2 housing, a 2.5" to 3" downpipe, and got a 3" test pipe. Those mods would give you a LOT more than the maf will.

Pluse the maf is still on a 2-3 week wait list. You can get the downpipe and other go fast parts a lot sooner. Change your mind and don't get the maf yet...

I really appreciate your opinion and every one else's even though I'm choosing to go a different path.

The quicker spool wasn't the only consideration, the other reason's are fuel cut and the ability to do some fuel tunning. Whether or not I'll get much out of the fuel tunning with out new injectors I don't know, but I like that I have that ability. I'm not going to run a test pipe so that is not even a consideration, I'm running a 3" cat and 3" exhaust, which is over kill for my 16g, so I don't think the difference will be huge. I'm not saying there won't be one, just not big enough to go with out a cat.

I already ordered the translator, I did it last night before going to bed. I ordered from Dejon Tool. There website doesn't say anything about being out of stock, but if there is a 2-3 week waiting period I'll cancel and get the downpipe, and do the MAF next.

 

[90AWDTalon]

I got my translator today. I'm pretty happy with the results, all though they are different then what I was expecting. I didn't get much of an increase in spool. But I'm making very noticable power threw out the RPM range, especially at the top. Today was pretty warm and when its warm it feels like my car make significantly less power than when cold. Today after installing the translator it felt like my car pulled harder then it does on cold mornings except there was no fuel cut, I didn't turn it off with the translator it just went away for some reason. Also my car idle's better, it wasn't bad before but I noticed it as soon as I turned the key. The only downside is not the fault of the translator, but I cant get my pocket logger to work to tune. That was one the main considerations for getting the translator.

Downpipe is the next mod, hopefully in 2-3 weeks. Should make a big difference.

 

[90AWDTalon]

This morning it was pretty cool out, I got fuel cut at about 5000 rpm's. I turned the boost down untill I can get my pocketlogger working so I can see if it is safe to turn the fuel cut off.

I was really suprised at the power it made though, huge difference. If you guys are right about the downpipe being even better, I'm in for some real fun when I get one.