can i make 300whp with gt-40 heads?

[QDRHRSE]

300 fwhp will get you to the mid 12's in a 3000lb car....that translates out to around 255 rwhp. 325 fwhp (276 rwhp) will get that same car into the bottom 12's. It's funny because I keep hearing about all these 300hp GT40 combo's but rarely does it look that way when people go to the track. I also find it unusual that I have never seen chassis dyno numbers for a 300hp GT40/Cobra Intake/65mm/Ecam combo?

Notchback-

Your a twit. Your friend going 11.80's is a hair above the 300 hp mark with a 125 shot. I'm confused. Your point is? Your friend needs a 125 shot to do a tad better then you say he should be doing on the motor...help me out here.

I pride myself on being realistic. You want 300rwhp out of gt40 set up? Yeah, I guess you could do it, however, the port work alone would run more than a set of Twisted Wedge heads. If you are talking at the crank then its a done deal. Then you add in the fact that this guy wants to use a Cobra intake and an E cam.....come on guys.....that combo will make more TQ than HP! It's not a bad combo....just not 300fwhp.

 

[QDRHRSE]

Notchback-

Sorry for calling you a twit. That's not very nice of me. I mean everything else though. I should reserve name calling for people who really deserve it. My bad. This a Forum right? Even if an opinion is unpopular- this is the place for it....right?

 

[Curse]

For the price of the heads + the port job you are going to get done, you realize you can get a decent set of aluminum heads? Such as used trickflow or AFR.

$600 can get you a used set of aluminum heads. Not only do you get the flow, you also drop 50 pounds of weight.

 

[25thmustang]

I run with a bunch of cars that have GT40 heads, stock cams, and Cobra intakes, as thats what the rules allow. Before you tell me they are purpose built cars, not one has a trick bottem end, not one has lightweight internals, balanced bottem ends, or any special parts. The heads on the cars arent ported, but do have valve jobs, have been milled, and have better valves and springs. All this taken into account the cars make anywhere from 280 rwhp to 320 rwhp, and run anywhere from 11.9 - 12.3s.

I personally have E7s with no porting on the intake or exhaust side, a stock bottem end, and stock cam and have made 265 rwhp and ran 12.56 on a stock suspension like this. With 272 rwhp (another stock bottem end, but rebuilt) I ran 12.9 on radials, but didnt get a good pass on the slicks before dropping the other short block in.

A lot of stuff wont be seen at local tracks, but then again there are plenty of cars out there running the numbers. 300 rwhp on ported GT40s isnt that hard, and set up right will go low 12s on slicks, if not faster.

It probably would be cheaper to go faster and have room to grow with a used set of aluminum heads, so if its in your cards, you might want to consider that route!

 

[cwdunnet]

if you spend the money go wtih afr's
if your on a budget go with gt40 aluminums

i dyno my mustang 293 horse and 334 ft lbs torque...and i only run a 13.48 at 105
but i also have aod that sucks..

 

[Flavadave4]

if you spend the money go wtih afr's
if your on a budget go with gt40 aluminums

i dyno my mustang 293 horse and 334 ft lbs torque...and i only run a 13.48 at 105
but i also have aod that sucks..

293 to the wheels?
thats respectable for the mods....are the heads and intake ported/polished?

 

[Daniel50]

yeah i thinking for 600 dollars i could probably pick up a set of used twisted wedge heads. the extra 50 pounds dropped off the front end sounds good to me... damn decisions.

 

[StangFireman]

Last year I ran FTI E7's, stock cam, light pistons and rods. Went a best of 12.03 et and 113mph. It made 285hp to the wheels and 348 tq. This was an NMRA legal Factory Stock motor on BFG drag radials with a best 60ft of a 1.61
Now the car has in a stock 86 short block with un-ported GT40's and explorer intake. Never dynoed it, but it has gone 12.32@108 on BFG drag radials, AOD with a good converter and a best 60ft of a 1.65 so far.
Car weighs 3000lbs with me in it.