Combo advice

87foxstang · May 23, 2010

Hey, im putting together a HCI combo to do this winter. I have a few questions. Let me know what you think.

Trickflow twisted wedge track heat heads(already have)
Cobra intake(already have)
Unsure on the cam, looking for suggestions
75 mm throttlebody
75 mm mass air
36 lb/hr injectors...Are they big enough?

Car already has all the basic bolt ons, and will have the fuel support ect
5 speed t-5
3.55 gears

Basically I want some suggestions on a cam, and if the injector size is big enough.

Thanks guys

2000xp8 · May 23, 2010

Use a better intake, maybe an edelbrock rpm or II.
Go custom with the cam, that extra $150 can get take you pretty far.
Max 30lb injectors, but even 24's would be fine.

87foxstang · May 23, 2010

Thanks for the advice
I was thinking about going with a custom cam through CI, maybe that will be the route I will take.

As far as the intake, I would like to keep it unless it really limits me

2000xp8 · May 24, 2010

87foxstang said:
As far as the intake, I would like to keep it unless it really limits me

It does.
Some will say it doesn't, but i've seen it all on the dyno.
You have one of the better sets of heads, might as well get one of the better intakes, this way in 2 months you don't have to do it again.

MikeROD16 · May 24, 2010

yeah cobra intake is OK. but not nearly the best. Unless you port it out and make it match up to the heads, you maybe would wanna go for better intake. You can sell that cobra one for like 100 bucks and use it towards a holley systemax or edelbrock.

EDIT: Oh and the T5 will not hold up lol. T5's come already too weak for stock application. Get yourself a tremec or maybe beef up your t5. 3.55's are good but depends what you want. You can go 3.73's or 4.10's. That all depends on ur transmission and driving pref.

RsStanG1987 · May 24, 2010

MikeROD16 said:
yeah cobra intake is OK. but not nearly the best. Unless you port it out and make it match up to the heads, you maybe would wanna go for better intake. You can sell that cobra one for like 100 bucks and use it towards a holley systemax or edelbrock.

EDIT: Oh and the T5 will not hold up lol. T5's come already too weak for stock application. Get yourself a tremec or maybe beef up your t5. 3.55's are good but depends what you want. You can go 3.73's or 4.10's. That all depends on ur transmission and driving pref.

Care to back up your t-5 info? They will handle 300hp no problem. The problem with t-5's is beating on them. If his car has a wc t-5 it will last him long enough depending on what his car is being built for. As far as his cobra intake he can pull 250 for it easy. his car is already rocking 3:55's so why would he change. Read the post then make your answers.

To the origonal poster what 2008xp8 said is pretty much spot on depending on how wild or mild you wanna make your car. Id personally get a trick flow intake to match the heads you got.

There are way to many people in thetech forum lately who arent reading the posts fully and throwing misguided information around.

87foxstang · May 24, 2010

Thanks for the replies guys. Looks like I might as well look for another intake, as I want the most I can get out of this combo.

The t-5 is WC recently rebuilt/ I could care less how long it lasts. I want that t56 in there

So it looks like the injectors and MAF sizes are good to go?

No.11 · May 24, 2010

What exactly is it about t-5s that is weak and could be beefed up to make it handle about let's say 350whp?

SScott · May 24, 2010

I have talked to some dudes in the 10's with a T5, some even going on 2 years with it. It really depends on the driver. If you side step the clutch with a stock 6 banger you will blow a T5 eventually.

RsStanG1987 · May 24, 2010

Yeah man just get that cam and intake and thrash it up. Should probabbly beef up your fuel pump also.

87foxstang · May 24, 2010

RsStanG1987 said:
Yeah man just get that cam and intake and thrash it up. Should probabbly beef up your fuel pump also.

Yup, will have all the fuel support

MikeROD16 · May 25, 2010

Ford Mustang: Mustang Tech: Transmission and Drivetrain: Borg Warner T5 Transmission data

There you have it. The T5's were to have held only to 265 lb/ft of torque while the mustang had 300 from factory. In 1990-93 is when they beefed it up but just only to hold up the power it made.

Inform yourself before you start talking garbage. Why do you think most people swap them for a tremec or some other transmission? T5's are always breaking because of the lack of power they can withstand. My friend has a mild HCI combo and he's gone through 4 different T5's

f8tlfiveo · May 25, 2010

T-5's are ok if you don't slam gears.. I replaced all the internals in my t5 with gforce parts, cause I shreaded third gear. The weak part of that trans it the cluster shaft. 3rd gear is the farthest away from both bearings and the shaft flexes because of all of the force on 3rd gear. Once it flexes too much it will slip and shear off all the gears on the cluster..I blew mine, but I drive mine hard, that's why I replaced everything in the case with the beefier g force shaft and gears.. Like I said it depends on the driver..

SScott · May 25, 2010

MikeROD16 said:
Ford Mustang: Mustang Tech: Transmission and Drivetrain: Borg Warner T5 Transmission data

There you have it. The T5's were to have held only to 265 lb/ft of torque while the mustang had 300 from factory. In 1990-93 is when they beefed it up but just only to hold up the power it made.

Inform yourself before you start talking garbage. Why do you think most people swap them for a tremec or some other transmission? T5's are always breaking because of the lack of power they can withstand. My friend has a mild HCI combo and he's gone through 4 different T5's

If your friend has gone through 4 T5's and has not upgraded... You should spend your energy talking to him. This is just one thread, I have about 6 threads and a several personal experiences if you need more). Bottom line, the T5 will hold up to the power if you drive it right and yes, eventually after abuse it will fail.

90lxcoupe; said:
Ran 1.53 60 fts. all day long with a 100K+ T-5 no

problems. All powershifts on nitrous out of the hole. I had 2.95 gear t-5 in the car for 14 years never broke it. I now have a G-Force
geared trans from Hanlon. It's clutch, launch & shift. I was on the firewall adjuster all day someteime to keep it right.

Heater; said:
I've been on what should of been a high ten second run with a T5-Z in a 3300# Mustang. The clock malfunctioned and I didn't get a slip. It's been a bunch of high/mid 11's on motor and a few low 11's on gas.

I use just a King Cobra clutch, 3.73 gears in the rear. My car is my daily driver, that's why I use such a mild gear and clutch.

Bellman; said:
The key to making a T5 live is getting the mainshaft and countershaft shim adjustment right.. I have never seen a stock T-5 that didn't need shimmimg.. The next one you see laying around, grab it's input shaft.. I'll bet you can wiggle it around..

When I ran a T-5 in my kenne-bell supercharged street car.. I up graded it with the 2.95 "super alloy" first gear set .. And with a good short throw shifter, I could POWER SHIFT all the gears and run mid 11's at about 120 on drag radials.. I later sold that tranny, and it still worked perfectly..

p302stang; said:
3150 LB mustang centerfoce d/f clutch 10.32 @ 131 mph 1.49 60 fts spraying 150 out of the hole on a 4k launch t5z with 2.95 1st gear lasted about 1.5 seasons with no power shifting finaly broke teeth off 3rd gear. I think i was lucky it lasted that long t5's are junk.

qwiknotch; said:
1987 GT, 3050 with driver 302/tw heads/gt40 intake,

250 shot of nitrous. 4.10 gears, 28/10.5 slick. Stock T5, steel bearing retainer, Centerforce Dual friction clutch, aluminum flywheel, the trans was all stock, but had carbon fiber block rings, it was clearanced at .005 and some other tricks my trans guy did to it. I ran an aftermarket steel driveshaft (the SVO aluminum ones were notoriously out of balance) It ran 11.80 on the motor and 10.30 on the nitrous and I drove it to and from the track.

I put the same type of trans into my 1986 Coupe. 302/gt40p heads, 4.88 gears n/a with a T5. It was 3200lbs on a 26/8.5 slick. I launched
at 6800 and shifted it at 7200. and ran 11.50's on the motor. I switched it over to 355 gears and hit it with a 175 shot and ran 10.50's on the 8.5 slicks

The engine/trans is in a 67 mustang now running around San Diego.

mideastbusa; said:
2 & 1/2 years in a full weight GT,slicks and a hole heap of 5 grand launches.The rear end broke first,then 1 day on the street playing around on street tire,lost all forward gears but 5th.

86lxnotch; said:
i forget what gearset i had in mine but with 300rwhp and 3200+ raceweight i dumped it at 6k and pulled 1.62 short times and ran 12.4's at 109 i think it was. never broke one doin it either

il_wolf_li; said:
Stock T5 (King Cobra clutch, PRO 5.0 shifter) in a '89 LX Hatch with H/C/I 3.55 gears and nitrous... ran 12.4@110 all day long on motor launching at 5,800-6,000rpm on slicks 60ft in the 1.58-1.65 zone. Sprayed it with nitrous and ran numerous high to mid 11's. Upped the spray a little (120shot) and went 11.1@124 and the next pass it blew 3rd gear. It lived longer than I had expected cause I beat the hell out of that tranny for 2 years.

f8tlfiveo · May 25, 2010

T-5's are ok if you don't slam gears.. I replaced all the internals in my t5 with gforce parts, cause I shreaded third gear. The weak part of that trans it the cluster shaft. 3rd gear is the farthest away from both bearings and the shaft flexes because of all of the force on 3rd gear. Once it flexes too much it will slip and shear off all the gears on the cluster..I blew mine, but I drive mine hard, that's why I replaced everything in the case with the beefier g force shaft and gears.. Like I said it depends on the driver..

f8tlfiveo · May 25, 2010

Double post

90lxcoupe · May 25, 2010

That post above has a quote from me on there, and i never that, not sure where you got that from but i have a TKO in my car, and the only car i ever had with a T-5 was my 90GT that was pretty stock. So i'd call ur multi quote evidence a FAIL. You cant argue it, t-5's are junk if you powershift them, if they were good then there would be no such thing as 3550's or TKO's.

SScott · May 25, 2010

90lxcoupe said:
That post above has a quote from me on there, and i never that, not sure where you got that from but i have a TKO in my car, and the only car i ever had with a T-5 was my 90GT that was pretty stock. So i'd call ur multi quote evidence a FAIL. You cant argue it, t-5's are junk if you powershift them, if they were good then there would be no such thing as 3550's or TKO's.

Fail huh? I know this may come as a surprise to you but you are not the only one that goes by 90lxcoupe: Yellow Bullet Forums - View Single Post - Who is using or has used T5's at the strip before?

2000xp8 · May 25, 2010

T5's are subject mostly to driving habits, if you are slamming gears and powershift with a strong clutch, ya you are going to break it.

Sometimes they can last long based on the clutch used, if your clutch has zero slip, it's sure to break sooner

To the original poster, i would NOT use 36 lb injectors, they are too much.
30's will feed a 450rwhp NA 347 , so you certainly don't need 36's for 130rwhp less.
Size the injectors for your usage now, don't listen to anyone that tells you that you'll have room to grow.

90lxcoupe · May 25, 2010

well im the only 90lxcoupe on here, mabye next time, post where you got things from.

2000xp8 said:
30's will feed a 450rwhp NA 347 , so you certainly don't need 36's for 130rwhp less.

where is this 450rwhp 347 on 30 lb injectors? Its not goona hurt anything running a 36lb injector

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