thinking about getting a different intake.....

MI95Cobra · Dec 26, 2007

with my mods, would it be benificial to get a different intake...maybe a trick flow, edelbrock, or a holley intake???...or should i just keep my stock cobra one???

final5-0 · Dec 26, 2007

I do not feel the Cobra restricts airflow you until you go to the complete
aftermarket h/c/i combo.

When one gets to that level ... I feel the Cobra just can't keep up with
an aftermarket mid length runner intake when at the high end of the
rpm range.

I'd say you would get more benefit from LT's at this time than a
different intake

Grady

HGFireHazard · Dec 26, 2007

I agree with Grady.

I also agree that a good mod for you at this time would be long tubes as well. They aren't the easiest things to put in, but they are worth it in both sound and performance as you continue to add performance mods to your machine.

blksn955.o · Dec 26, 2007

Look into getting the lower ported. With the low end trq. the gt40 family makes and the gain in the upper end breathing from porting it, I think it would be a nice intake for a mild alum. headed street car.

Tmoss does them and at a price that will be hard to beat to better match a set of alum. heads. I got to watch him port mine and I learned a good bit from just watching him and what he was pointing out when he made the cuts.

MI95Cobra · Dec 27, 2007

sorry i just want to clarify everything.....ok, so look for some long tubes with a new exhaust??? also just in case everyone is clear i have aluminum edelbrock performer heads with an e303 cam.....so would a different intake be better..????

final5-0 · Dec 27, 2007

MI95Cobra said:
sorry i just want to clarify everything.....ok, so look for some long tubes with a new exhaust??? also just in case everyone is clear i have aluminum edelbrock performer heads with an e303 cam.....so would a different intake be better..????

Yes Jimmy

I saw that info in the sig you provided which was a big help

thus

Making it all the more easy for me
to make a decision on the best way to answer your concerns

Grady

5spd GT · Dec 27, 2007

Have the lower ported by tmoss. While conversing with him, ask him if he thinks switching to a larger intake would be beneficial.

I do not see it being a problem, unless you plan on running above 6,000 RPM.

urban96 · Dec 27, 2007

ive been thinking about making the same move, only i already have a TFS street intake sitting in my garage ready to go on

but, i only have some worked GT40P's. only reason i wanted to do the switch was over 5K the setup seems to fall off

box stock cobra intake, 2031 cam, worked p's, full exhaust

i think im gonna do a few other things b4 i swap intakes and if i dont like the TFS ill send the cobra lower to tmoss and swap back and sell the TFS

final5-0 · Dec 27, 2007

Not to sound like a smart azz or anything

I would like to make sure it is seen I was trying to help in the upper
areas of the power band.

I mean ... Jimmy already has a set of aftermarket aluminum heads
and a cam.

That is why I talked about something different than the typical longest
runner intake such as the Cobra

Notice above ... I did talk about working with a ......
mid length runner upper

Not to say anything bad about Tom's work or anything like that
but
Port that OEM Cobra
and
You still have a long runner upper

Also ... I was motivated by his focus on a ... different intake

Grady

blksn955.o · Dec 28, 2007

I always thought the TFS street intake and like aftermarket intakes were along the same basic runner length of the gt40 family but with a larger runner cross section and better designed lower (more even port shape threw the length).

From what I have read/gathered' the long runner is what helps make the trq with smaller CID engines. The best mix of trq and power coming from long runner intake and slightly larger runner cross section as the long narrower runner length is what builds the volcty. of the air for low end and better cross section for upper rpm use. For an extreme look at the efi victor intake that looks like it has runners about the lenght of a middle finger and suited better for 393+ motors that do not need the low end.

Every intake test (I am not a big fan of mag racing) in the rags on a 302 based motor gains little for money spent on a new intake (if the gt40 is stock) and looses some in a few cases. Not with just stock heads but heads that fill a 302's needs.

To me a short runner intake is the way to go on a stroker or + motor or something 100% track and high rpm in a 302. Depending on what edlb heads he has with the letter cam I would not see the need for much past 5800-6k.

As always good info and opinions, the good news is you have options since you have a gt40 intake stock so at least you have something to sell to offset an aftermarket intake if you go that route.

I would discuss it with Tmoss and see what he thinks as he really knows his stuff and has seen a few intakes. Good luck.

final5-0 · Dec 28, 2007

All you said looks good to me Greg

I've always seen the OEM Cobra as being very similar to the Street Heat in the
TFS line and the Performer in the Edelbrock line.

I was kinda placing a focus on the mid length runner choices which would be
the Track Heat in the TFS line and RPM II in the Edelbrock line.

My thinking here would be to keep the power from dropping off too early
like you see a good bit of the time with the longest runner intakes.

As always ... its about expectations or goals first
and then
Picking combo parts that meet those goals with the least compromise

Jimmy was considering a different intake and after looking at his sig ..........
I saw the shorty headers so I was kinda thinking ........

LT's would give a better gain at this time than an intake
but
After the LT's ... I'd just sell the Cobra

Then ... go to a mid length runner intake for a bit more power on the
high end of the rpm range.

I can't be certain about that e-cam
Maybe it is not setup to pull power all the way to 6K

If not ... My idea here might not be all that effective

Grady

earleys94gt · Dec 28, 2007

With the e-cam not being that aggressive of a cam, and unless you plan on reving the engine pretty high, I would look into just porting the intake.

Then again if the cost of porting is close to the price of a new, better intake then you may want to go that route to have even more potential down the road.

MI95Cobra · Dec 29, 2007

thanks everyone for your opinion....after my last response i've been looking at changing my exhaust....long tubes should add anywhere from 10-20 hp....well i'm trying to decide between MAC and BBK.....the MAC's it seems i have to buy one of their exhaust to match right up....if in case i went with the BBK i tried calling the place where i had my custom x-pipe and left a message....after the exhaust then i might go for a tfs intake....since the street heat would about equal my cobra intake would a track heat add anything more to combo or would i need to restart my whole project again???

5spd GT · Dec 29, 2007

Just for personal reference on my AFR 165/FTI cam/Performer h/c/i set-up, I added a new bottomend (306) over the 162k bottomend.

I also got the lower ported by Tmoss to match the AFR 165's, and then I added BBK longtubes over my smashed in Mac shorty headers.

After all that, I gained 1.3 mph. About 13 hp for the ported lower, new bottomend, and longtubes.

DDSTANG94 · Dec 29, 2007

5spd GT said:
Just for personal reference on my AFR 165/FTI cam/Performer h/c/i set-up, I added a new bottomend (306) over the 162k bottomend.

I also got the lower ported by Tmoss to match the AFR 165's, and then I added BBK longtubes over my smashed in Mac shorty headers.

After all that, I gained 1.3 mph. About 13 hp for the ported lower, new bottomend, and longtubes.

ya 13 hp dont seem like alot but i bet it pulled alot harder down low, and the power was probably seen in the curve, not the peak numbers right?

Do u have a before and after dyno sheet by any chance?? I would love to see what changes were made to the whole curve... 1.3 mph is damn good gain

5spd GT · Dec 30, 2007

DDSTANG94 said:
ya 13 hp dont seem like alot but i bet it pulled alot harder down low, and the power was probably seen in the curve, not the peak numbers right?

Do u have a before and after dyno sheet by any chance?? I would love to see what changes were made to the whole curve... 1.3 mph is damn good gain

Honestly, I did not notice as much of a difference down low as many had told me I would. I thought I felt a little something extra down low, but at the track it does not help me.

I spend the time racing from 3,500 rpm and up, and shorty headers and longtube headers are very competetive in the upper rpms.

For the street though, I guess it would provide you with a little extra kick at a low rpm, but usually I downshift if I want power so I am right back in the upper rpms.

The new 306 replaced a 162k engine, and had a bit more compression.

The lower was ported to match the AFR 165's ports better by a professional, tmoss.

The crazy part was my 10+ year old Mac headers, were hammered in some places for spark plug replacement ease, and one side of my H-pipe was crunched in a little bit over an inch (of the 2.5" pipe) when I replaced it. I was a little dissapointed with the results personally from the longtube swap.

It sure did sound better though.

Now, what I did notice was a little higher pull in the upper rpms, which I attribute to the ported lower, which got rid of the choke point.

The fact of the matter is, my average horsepower did not go up a whole lot in my racing rpm. But it was a gain none-the-less.

Sorry, no dyno results

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