Maxing out E7s

[MadDAWG]

Right now I have my E7s flowing in the low 190 cfm range thanks to my buddy's port work. That is still with the stock valve sizes. How much could a max effort set of E7s flow? We are talking about cutting in some 1.9/1.6 valves and he thinks there is more porting he could do.

Before anyone says they are not worth the time or effort keep in mind that this isn't going to cost me much more than the valves and gaskets to do the swap. Well that a few beers along the way. lol.

Right now with an e303 I have been able to tickle the high 12 second range. Over the winter I'd like to re-work the heads, add some flow tech long tubes, swap in a set of 4.10 gears, and maybe a different cam. My goal is to run a 12.39 or better which I think may be there.

I remember reading on here someone going all out on there E7s but I couldn't find the thread. Anyone know who that was?

TIA

[Bluegrass]

There is probibly about 210 left but if you are using stock lower and upper intakes, that will be the limit and not the heads at that point unless there is flow improvment made to them.
Good luck.

[MadDAWG]

I'm running an Explorer upper with the inlet opened to match my 70mm thottle body and a gt40 lower that has had the runners welded and reshaped. I have not had it flowed, but from the info I have been able to find it should be around 240 cfm.

[Bluegrass]

Ok. That being the expected case, the heads most likley will not be able to flow at that rate so you would be at about the end for airflow capability.
Look at the AFR 165 or other simular head's airflow to get a compairson feel.
Aso try to get you air numbers at all lifts from .100 to .600 to see how well your heads are really working and where the flow flattens out for both int. and ex..
If possible, airflow intake tract with the complete manifolds in place including the TB.
This is the real airflow the engine has to deal with.

[2000xp8]

Cleanlx is an E7 freak.

That's his thing. He's trying to get 300rwhp out of them NA on a stock shortblock. I'm pretty sure he's at somewhere around 290rwhp now.
But that's with a very custom cam, and if i remember correctly he said it's doesn't have all that great of driveability.

To me E7's aren't worth investing a dime on. Valves, springs, seals, aren't really that cheap.
If you heads are done well now, sell them for a couple hundred, then invest that money, and the money you were going to spend on the valvetrain on some wedges and make 300rwhp rather easily.
Then if your combo changes, your buddy can port them.

[MadDAWG]

Cleanlx is an E7 freak.

That's his thing. He's trying to get 300rwhp out of them NA on a stock shortblock. I'm pretty sure he's at somewhere around 290rwhp now.
But that's with a very custom cam, and if i remember correctly he said it's doesn't have all that great of driveability.

To me E7's aren't worth investing a dime on. Valves, springs, seals, aren't really that cheap.
If you heads are done well now, sell them for a couple hundred, then invest that money, and the money you were going to spend on the valvetrain on some wedges and make 300rwhp rather easily.
Then if your combo changes, your buddy can port them.

Yep that the guy I was thinking of, thanks!

I'm not going aftermarket heads any time soon. If I did I'd put them on the 342 that I have sitting in my garage "collecting dust". It's to easy just to throw money at a car to go fast. I know that AFR or Canfields would kick azz, but that's not what I'm going after. To me its more impressive to have a 12 second E7 car than an 11 second AFR head car. As thumper would say "Just Me".

[N8Miller]

you can prolly get another 10-15 HP out of them. I think that you would be better if you got a set of gt40 iron heads and started to invest porting on them!

[MadDAWG]

Actualy I have thought about that, and if I was to run across a great deal on a set I might go that way. However most people want 450 on up for a set which is too much IMO. Hell I bought a set brand new when they first came out for under $700.

[tmoss]

Actually, Mike sent me an email this month on his expereince with the car (292RWHP/325RWTQ in 113 heat). He said nothing about it's being anything but a blast to drive - and recall this is a ported STOCK intake (shortened about 1.75"), the Rawls cam and Power Heads that flowed 230/185. Here is his own words to me.......

"I've driven it home from the shop, where upon it over heated (phoenix, 117*F ambient that day).
Since then, I took my little sister for a play drive where I actually got on it for the first time. Temps were around 106*F, and, the car did not over heat.
Car is making all kinds of power.
Found myself surprised to see the tach up over 6500rpm and still pulling like a freight train.
Even with the baseline suspension/pro3i/lakewood/tqbox modified rear axle setup, going into 3rd gear hard produces enough wheelspin to require steering correction. Going into 4th hard will cause wheelspin as well... nothing insane, but much more than simply rolling the tires over for a squeek. None of these shifts were full on speed shifts, let alone power shifts. Keep in mind this is with 4.10 ring and pinion on 245/50-16 BFG Comp t/a's... not drag radials, but a pretty good street tire."
PS, I think he's got a real good shot at 11s.......

[MadDAWG]

Now that's what I'm talking about!

[srad2drag]

Actualy I have thought about that, and if I was to run across a great deal on a set I might go that way. However most people want 450 on up for a set which is too much IMO. Hell I bought a set brand new when they first came out for under $700.

I scored a set of gt40 irons for 300 and I'm in the process of getting them fully ported with 1.94/1.60 valves with a comp xe270 and ofcourse a tmoss ported stocker that i also sent to extrude hone afterwards....hopefully I will have some numbers no later than months end.

[MadDAWG]

Sounds promising. Keep us updated.

I was "dealing" with a guy on corral for some GT40p heads ported good springs shaved down, etc. He had a good price and I was just waiting on pictures, but he must have made a local sale becuase he just disappeared and left a few of us hanging.

[tmoss]

and ofcourse a tmoss ported stocker that i also sent to extrude hone afterwards....hopefully I will have some numbers no later than months end.

[MadDAWG]

you can prolly get another 10-15 HP out of them. I think that you would be better if you got a set of gt40 iron heads and started to invest porting on them!

Well my E7 plans are out the window. I just scored a set of TEA ported Performers. Deal was to good to pass up. Now I need to come up with a new plan. lol

[2000xp8]

Sounds like a much better plan now. No wasted money, and they will probably support more displacement.