Cams or Converter ??

[gotlag]

Basic setup in profile, but in the hopes of more answers I will put mods in short list:
Big 16G
190 pump rewired
Aeromotive FPR
RRE pipes
Methanol injection
3"exhaust
open o2 dump.

Have ordered my DSMlink and 1000cc injectors.
Next order is either a set of 272 cams, or a stall converter as my car is an AWD auto.

My big question is which of the 2 will offer the most gain for a car the runs 1/8 mile?
Stall converter to help the launch (or help the longevity of the transmission as I am having to brake stall the car to launch under boost), or the cams to help this car pull harder at the top? I am currently shifting into 3rd about 6-8 lengths from the traps. I started running test-and-tune days at the track about 3 months ago with no mods and running 10.5's and am now in the 8's. Want to be in the sevens by the start of the season so I have less than 90 days, so the mods I make have to be the right ones.

Thanks for any help in making this decision.

 

[trapspeed]

I'd go with the stall converter. But dude, you should really take getting a 255 into consideration with such large injectors.

 

[gotlag]

I'd go with the stall converter. But dude, you should really take getting a 255 into consideration with such large injectors.

See what happens when you post too fast..I already have the 255 sitting in the shop along with 30 feet of 6AN line to run from and back to the tank. Good point and that was important enough I should have listed them.
Thanks

 

[trapspeed]

See what happens when you post too fast..I already have the 255 sitting in the shop along with 30 feet of 6AN line to run from and back to the tank. Good point and that was important enough I should have listed them.
Thanks

Oh, good shit then.

 

[andymoraitis]

The 255 is wholly unncessary on a Big 16G as are 1000cc injectors. Don't oversize your parts and keep your system setup simple enough to avoid tuning around something. I'd never run anything bigger than 650cc on any 16G variant irrespective of whether I had DSM Link or not. Also, your 190 rewired is enough to get you into the 11's in the 1/4 and more than enough to meet your goals for the 1/8th mile.

As far as what will give you the best gains right now running 1/8th, it would be the stall converter. Cams can come later and make sure you size them properly to the amount of CFM you put out (under 600).

Good luck,

Andy

 

[gotlag]

The 255 is wholly unnecessary on a Big 16G as are 1000cc injectors.

OK. Looks like my first thought was correct and the stall converter is the way to go, but now I am a little uneasy with what I have already ordered thought I was going with sound advice going with the 1000cc's to go with the DSMLink. I don’t like buying anything twice anymore (under bought the first turbo, expensive lesson).

Is there that big of a tuning/performance issue going with the large injectors from the start? I know that the 16G will have a short life span on my car, as I went with it as I didn't want to go any larger until I fully understood the process of tuning for a larger turbo.

I do value want Andy has to say, I have read a great many of his posts so I don't want this to be a question of his knowledge, but a question of am I making a mistake that will hurt my ability to tune. Have built and ran many stand alone FI motors so not a newbie when it comes to understanding what the tuning process is, just have never done it on a turbo car.

Thanks,
Andy R

 

[andymoraitis]

Andy,

I can respect that you want others to chime in here and I'm good with that. I think when people buy DSM Link and hear that they can run huge injectors, they have a tendency to step up to the largest ones possible. I'm just saying that it makes more sense to run a bit more injector than you need. For example, I run my Big16G on 550's and am very close to maxing them out on my boost level. In hindsight, I should have gotten 650's so that I had a little more headroom and the ability to lower the duty cycles.

For your purposes, 650's are good enough to support an EVO III, 50 Trim and turbos of that size. I just think 1000 is overkill for what you're trying to do. I understand buying in anticipation of future mods, but with 1000's you could run a Holset HX-35 and that turbo flows nearly 2x as much air as the Big16G.

You could even go with 720's if you wanted and still be OK, but the 255 and the 1000's are just way too much for what you're doing at the moment and likely in the near future. Will the 1000's cause problems? That I can't answer, but hopefully someone who's tried it can add their knowledge.

Hope that helps,

Andy