I currently have a 350 TPI SD motor with portmached edelbrock base, edelbrock runners and aported plenum. I haven't swapped the cam, but I added 1.6 rr(increace in lift and slightly longer duration @.050"). Exhaust side is 1&5/8" shorty headers with edelbrock y-pipe into a 3" mandrel bent exhaust. Not sure how fast I am now, but before exhaust I was 13.9. My question is will I notice a gain from a 52mm TB and CAI (the "4 in. tubing to filter below airbox mounting plate" style) to justify the cost? If so, what kind of gains could I expect from these mods. I am currently breathing through the stock intake and 48mm TB(equipped with an airfoil).

Thanks for all your help
Kyle

 

If you are using the stock type paper air filter now then I think the CAI with a free-flow filter like a K&N should yeild a very noticable improvement. Atleast a tenth or two.

Even with your mods, I don't think the 52mm TB will do much. It might help a little but for the price I don't think it would be worth it, unless you can get a used one for $150. I'd wait to get a new TB when you get new heads or a cam.

If I were you I'd get a Vigilante torque converter (if you don't have one already and you have an auto trans). It might be as much as $700, but it should cut off a good .4 seconds in your 1/4 mi ETs.

Or you might want to look into PROM burning...

Just some suggestions.

 

He's right....a CAI would help, and a TB wont do much till you get heads, cam etc. But I'd go ahead and do a cam. You have all this air coming in and going out, and the cam can't utilize it. So you're not performing to your potential because you have that stock cam....so go ahead and utilize the power you have now, then add on.

 

I have a K&N filter, but am still using stock elbow (has a nasty kink to clear line to overflow tank). I cut a few windows in the airbox. Do you think the CAI might still give me .2?

 

yes a custom CAI with some nice big flow capabilities will help out your anemic stock intake... they were terrible.

Not applicable to your motor necesarily, but on the GMHTP 3rdgen SD EFI car, they yanked the intake to find a 30 horse increase.... just kinda shows the flow restriciton it poses... as for et, well you could very easily just yank it off at the track, make a run and see how it does, do so at your own risk, suckin up something through the intake isnt the best thing int he world....

Steve

 

See, you're misleading the guy. The reason they picked up 30 hp is cause that was a 400+ HP 396 w/ an accel super ram intake and accel management...not a 350 w/ TPI.

I'm trying to tell you man, forget the CAI for now, and get a cam. If you get the CAI, you're gonna be disappointed. You already have more air going in that the cam can utilize. Plust the stock intake is a CAI. Do you know how many guys are running 12's and faster w/ the stock intake? But if you wanna listen to somebody telling you you'll pick up 30 HP for a CAI, then go ahead and spend $300. Would you rather pick up 10-15HP w/ a CAI, or 25-30HP w/ a cam? If you dont wanna tear into the engine, i understand, then go ahead and get the CAI, but dont expect 30 damn HP.

 

I (being one of those with a CAI) actually agree with ir0cz. If you've put that much work into the engine and are comfortable yanking stuff apart, do the cam first. The CAI will help....but probably take just as long to install as a good CAI.

As far as the stock intake being a CAI....I don't know on that one. All I know is that mine wasn't....it was utter crap. But the 91 was a little different.

Cam it up!!

 

Of course the stock intake isn't as efficient as the SLP CAI, but look at it....it's getting a hell of a lot cooler air than most intakes.....such as a TBI/carb open element, or a filter mounted directly to the TB as onsome SD cars.

 

That would be why i said Notice i said "not applicable to your motor"....

I hate it when people try to nit pick your advice apart. Its mearly my opinion that its going to help. obviously, its not going to result in a 30hp increase, but it IS a worthwhile mod that will now OR down the road help out. It was only an example to the fact that the stock intake is restrictive... no where did i say he was going to pick up that much power...

TPI or superram or whatever, the intake is quite restrictive, even for a somewhat stock 350. Take the smallest cross section of that pipe, and figuer out what it can flow, and i would bet its in the 500-530 cfm range. So if you have a 500 cfm intake, and a 575 cfm TB, where's the restriction? the intake of course.

Please let this be a lesson to you Irocz- i'm not being misleading, just offering advice, and making a comparison to get my point across. Its not fair to myself nor anyone else to have a finger pointed at them like that.



Aside from all that If your comfy doing the cam, by all means, the cam is the biggest power restriction. change that to say something comparable to a compucam 2040, or 2050 (COMPARABLE) you'll have a nice 300hp+ ride that will hopefullycut some low 13's maybe even 12's, AND be streetable still.

Irocz, no harm, no foul ment, just wanted to give my point of view on what i was trying to say

 

Man, you're making a big deal out of nothing. I made a mistake....i did not see where you said "may not be applicable to your motor"...my mistake, i apologize. But dont try and "teach me a lesson" If you'll notice, i agreed w/ you on the fact that a CAI will help. So I on no aspect disagreed w/ you, i merely overlooked something you said, which i just appologized for. That's what I get for "skimming" over posts. But you can understand where i'm coming from....didn't want the guy to expect 30HP then be realy disappointed that he made half that. It's cool though....like you said.....no harm, no foul meant....everything's cool.

 

Yeah sorry- lol there's a peticular GTA in my garage with slp stuff on it which is kinda getting on my nerves... not very impressed with there headers in peticular the y pipe.

Anyways, i understand where you were coming from its all good