hp from explorer setups?

[cornholio47]

my mods are as follows:

bored .030
explorer upper and lower
e cam
gt40p heads
gt40 shorty headers


i just wanted to know what hp numbers other ppl were getting out of their cars with this or other related combos.

 

[tmoss]

I got 40 RWHP untuned. You should see 50+ RWHP with a good tune.

 

[Michael Yount]

Tom - what's involved with the 'NMRA prep' on your heads?

 

[tmoss]

I don't know about the rules now, but when these were done.........NMRA did not allow any porting. 58.5cc chambers, the valve seat depths are optimized, max valve sizes (1.85 & 1.55) are used, undercut stems are used, A good 3 0r 5 angle valve job (didn't ask which of Troy) and then the valve spring heights are also set correctly. Comp Cams springs, Titanium keepers, Isky guides and studs. I guess a "blueprinted" head would be a correct description.

 

[Michael Yount]

Thanks Tom....often on rules like that, port matching can be done, but there's a limit as to how far into the manifold or head material can be removed. Do you know if that's the case here?

 

[tmoss]

Nope - no cutting tool has touched these heads other than the shaving, valve seats and maybe the spring seats.

 

[astronut1885]

On the setup, I have GT40Ps with valve work, Exploder intake, E cam, 1.7 rockers, U/D pullies, MAF conversion, stock MAF and TB, full 2.5" O/R exhaust, and some other little things, and I planted 258 RWHP untuned. It's a great budget setup, but I highly recommend having the heads worked, I wish I had. I am going to supercharge soon, and I've added some other mods, so take a look at the link in the sig to see everything I have now.

 

[tmoss]

astronut - we have very similar setups, but I don't have the E cam (stock 87 cam) or the 1.72 rockers (mine are 1.6) and we made 1HP difference on our untuned first dyno. My car made 309RWTQ though.

 

[Michael Yount]

Y'all don't go too far comparing those numbers guys....

 

[tmoss]

Y'all don't go too far comparing those numbers guys....

??????? uh, OK (is that a request or statement Mike?)

 

[astronut1885]

My MAF and TB are choking the crap out of my motor, my timing was 22*BTDC, and my fuel ratio was 12:1. My car wasn't even close to running good. I'm probably getting a blower soon, so I'll be taking care of the inadequacies.

 

[Michael Yount]

Just meant different cars, different dynos, different operators, yada, yada, yada.....

 

[Stang89LXCPE]

Hey Tmoss, what cam are you running in your setup? I have an 86 that I am building and keeping SD, and those numbers are very respectable.
I would like something similar, have a 99 explorer intake, lower is ported a tiny bit and 95 gt-40's. I have a couple cams at my disposal.

Thanks
Steve

 

[Stang89LXCPE]

uhm ok, I can read..Do you care to share the specs of the 87 SD cam? I 've got a couple 86 stock cams and 1 87 and 88 cam. I just got my degree wheel sp I'm ready to start checkin them!

 

[cornholio47]

well...im hoping for some good numbers but i really am not sure. i was pushed for time so i couldnt work the heads. i was hoping for about 250-260rwhp..torque.... i have no idea.

 

[tmoss]

uhm ok, I can read..Do you care to share the specs of the 87 SD cam? I 've got a couple 86 stock cams and 1 87 and 88 cam. I just got my degree wheel sp I'm ready to start checkin them!

You will have to measure each cam installed with the degree wheel. It will take some time, but it will allow you to choose the best cam AND find the best installed ICL.

My 88 cam measurements:
Measured @ .050" IVO-4°ATDC, IVC-43°ABDC, Duration-219° EVO-43.5°BBDC, EVC-11°BTDC, Duration-212.5° Overlap was -9° Installed at 108.5 ICL

 

[Stang89LXCPE]

astronut - we have very similar setups, but I don't have the E cam (stock 87 cam) or the 1.72 rockers (mine are 1.6) and we made 1HP difference on our untuned first dyno. My car made 309RWTQ though.

You will have to measure each cam installed with the degree wheel. It will take some time, but it will allow you to choose the best cam AND find the best installed ICL.

My 88 cam measurements:
Measured @ .050" IVO-4°ATDC, IVC-43°ABDC, Duration-219° EVO-43.5°BBDC, EVC-11°BTDC, Duration-212.5° Overlap was -9° Installed at 108.5 ICL

Thanks for the useful info. Was that for the 87 cam, 88 cam or 88 cam with a typo? I figured you had one of the early 87 "race" cams!! I'm curious if the 86 cams are of the healthier grind than the later cams.

Thanks again
Steve