View Full Version : what kind of times are they running in NMRA Factory Stock
Thinking about putting some gt40p's, and some 4.10's, or 4.30's on my car so I can compete in factory stock, but unless I can run better then low 12's I dont think I can be competative.
Just curious if it is worth my time.
bert89coupe
12-23-2002, 06:16 PM
yes, i'd be interested in this answer also.
what exactly are the rules to this class??
Jimbo
12-23-2002, 06:17 PM
Last I had heard Justin Burchum had gone real high elevens, but I believe the majority of the class is between 12.7 and 12.2.
I dont feel so bad with some gt40's I think I could be in the mid to low 12's
This class limits you to stock cast ford heads, ford intake, and stock botom end.
You also have to use stock k-member, and stock style suspension.
So you can run iron gt40's and cobra or gt40 intake.
Also forgot no porting alowed in intake or heads.
Jimbo
12-23-2002, 06:23 PM
Originally posted by bert89coupe
yes, i'd be interested in this answer also.
what exactly are the rules to this class??
Only factory parts allowed, cobra bits on BJ's car is fine. only shorty headers, no trick stuff like aluminum radiators or heads, cams not to be bigger than stock, etc.
bert89coupe
12-23-2002, 06:24 PM
damn, then count me out.
Originally posted by Jimbo
Only factory parts allowed, cobra bits on BJ's car is fine. only shorty headers, no trick stuff like aluminum radiators or heads, cams not to be bigger than stock, etc.
I was curious about the cam thing. i can run a differant cam, but it can only be 480 lift right?
just curious if anyone makes a factory stock specific cam.
Jimbo
12-23-2002, 06:31 PM
Originally posted by DarkPony
I was curious about the cam thing. i can run a differant cam, but it can only be 480 lift right?
just curious if anyone makes a factory stock specific cam.
480 is the limit, not sure about duration though. it has to be within spec rules, and i think they changed a while back. i think most of the guys run a stock cam so they dont have to worry about it. lol
Jimbo
12-23-2002, 06:32 PM
ah ha
http://www.nmraracing.com/rules/factory_stock
Jimbo
12-23-2002, 06:40 PM
That would be cool BJ, you should do it. Regardless of how competitive you would be, it would be fun. Heck they sometimes have guys running 15's in that class.
32VfromHell
12-23-2002, 06:42 PM
isnt bob cosby running factory stock running 11.7x`s ? :confused:
FatassLX
12-23-2002, 06:43 PM
some are in the high 11's
Jimbo
12-23-2002, 06:46 PM
I think Cosby, Burcham, and one or two more have hit 11's. Is Cosby doing well recently? I haven't heard much about him lately.
I have been looking at this rule, what is stock cc size on gt40p heads.
1.17i) HEADS, COMBUSTION CHAMBER VOLUME: Minimum combustion chamber volume for 302W heads is 58.0 cc’s
Jimbo
12-23-2002, 06:51 PM
Originally posted by 32VfromHell
isnt bob cosby running factory stock running 11.7x`s ? :confused:
I read Burcham went 11.7 recently, but I thought that was the new record.
Jimbo
12-23-2002, 06:53 PM
Originally posted by DarkPony
I have been looking at this rule, what is stock cc size on gt40p heads.
1.17i) HEADS, COMBUSTION CHAMBER VOLUME: Minimum combustion chamber volume for 302W heads is 58.0 cc’s
Why not just run some milled GT40's?
that is what I am thinking, you can also run different pistons adding more compresion.
here are the cam requirements. basicly a stock cam with 1.7's
5.0 Engines – .480” maximum valve lift (checked at retainer) and below specified lobe durations and lobe separation angles
Note: Lobe duration is checked at the below specified lobe lifts.
Lobe lift Maximum duration
.050” -- 211
.100” -- 179
.150” -- 148
.200” -- 115
Maximum lobe separation angle – 117 degrees, Minimum lobe separation angle – 115 degrees
Jimbo
12-23-2002, 07:07 PM
Not much room for cam work. I think the GT40P is 60cc while the GT40 is 64cc. Don't quote me on those though.
That is interesting. I couldnt mill much on the p's but could alot more on the gt40's. The p's are supposed to be better though.
Five Point Slow
12-23-2002, 07:13 PM
Why would you bulid your car to meet these requirments if you're only gonna be able to run this class 1 or 2 times a year ?
Build a car for yoruself.
Jimbo
12-23-2002, 07:21 PM
Originally posted by DarkPony
That is interesting. I couldnt mill much on the p's but could alot more on the gt40's. The p's are supposed to be better though.
I just wouldn't want to have to buy different headers.
You have to take a very scientific approach to running in this class. There are plenty of guys who go through piles of factory part trying to find the rocker with the highest ratio and stuff like that. Its sick!
Originally posted by AL P
You have to take a very scientific approach to running in this class. There are plenty of guys who go through piles of factory part trying to find the rocker with the highest ratio and stuff like that. Its sick!
ya, I kind of figured that out, I was on nmra, and hardcore, and some of those guys will go threw 10 sets of heads before they decide which one they will go with, and shit like that.
I dont expect to put a set of milled cobra heads on my car, and go 11.7's but a low 12 would be cool. I think that is an acomplishment on its own. I have just decided with this car, I have enjoyed doing the little things, and getting small improvements every time I go to the track, and widle down the times, and just get out there and drive. IT is fun. I dont know It also depends on cash flow. If I get some extra money, I want some afr's and a custom cam, but that prolly isnt gonna happen now. Who knows we will see. I can get a used set of gt40's for $400, and take them to the machine shop, and have them milled, and cleaned up. put some new valve springs in, and throw them on, but I want a cam too. It is hard. I dont know. If I had a thousand bucks in my hand right now, I would know exactly what I would do, but I dont. We will see, I will think threw this for another week or two, then make my decision.
Bottom line is, I love to race, and would like to build a car that I can race in a sanctioned event series. maybe in a few years I will be able to do that. Build me up a little coupe, and go run pure street.
DMcRacer
12-23-2002, 10:20 PM
Bob Cosby=11.67@114.6
musclestang89
12-24-2002, 03:09 AM
darkpony
Here is a good site that points out everything about the gt-40p heads and the gt-40 heads. It might be worth looking at and be able to answer your questions about themhere it is (http://motorcitymustang.corral.net/gt40p.html)
Brandon
I got a set of P heads that I am going to be parting with soon, they will need a valve job and some springs and may need a guide or two, they are making some funny noises.
Originally posted by AL P
I got a set of P heads that I am going to be parting with soon, they will need a valve job and some springs and may need a guide or two, they are making some funny noises.
are they coming off your Fox GT
Did you have to run a p specific header. Just curious to see if I needed different headers.
bsharer
12-24-2002, 02:58 PM
The FS class is SICK.
If you even want to have a semi-competitive car (12.10's or so) , you are gonna spend TONS of cash. There are several cars in the 11.7's @ 114 ish last year.
You must run DRAG RADIALS too. So you cant think that your 12.9 @ 105 + some GT40 heads would give you a low 12... You ADD 300#'s for Gt40 heads! Thats a 3300# race weight. And then you got to take off the slicks.
A 11.7 combo with GT40 heads weighing 3300#'s would need to push 330 rwhp/370 rwtq... or so. They are running 1.70's 60's on 275/15's DR's. Thats will a FULL rear suspension... anti roll bar, adjustable shocks, etc...
They have all the regular stuff that a guy would think about... and then some. Pro shifted tranny, Digital 7 ignition so they can change the timing per cylinder, $475 SHORTIE headers, intank pump AND booster pump with 30# injectors, ULTRA lightweight pistons, 10.5:1 compression, custom valves and valve job, custom rings to reduce friction, etc...
If you want to even be in the same league, its gonna HURT your wallet!!!! LOL!
Originally posted by bsharer
The FS class is SICK.
If you even want to have a semi-competitive car (12.10's or so) , you are gonna spend TONS of cash. There are several cars in the 11.7's @ 114 ish last year.
You must run DRAG RADIALS too. So you cant think that your 12.9 @ 105 + some GT40 heads would give you a low 12... You ADD 300#'s for Gt40 heads! Thats a 3300# race weight. And then you got to take off the slicks.
A 11.7 combo with GT40 heads weighing 3300#'s would need to push 330 rwhp/370 rwtq... or so. They are running 1.70's 60's on 275/15's DR's. Thats will a FULL rear suspension... anti roll bar, adjustable shocks, etc...
They have all the regular stuff that a guy would think about... and then some. Pro shifted tranny, Digital 7 ignition so they can change the timing per cylinder, $475 SHORTIE headers, intank pump AND booster pump with 30# injectors, ULTRA lightweight pistons, 10.5:1 compression, custom valves and valve job, custom rings to reduce friction, etc...
If you want to even be in the same league, its gonna HURT your wallet!!!! LOL!
ohh, I knew I would never be competative, unless I had the wallet, I would just like to run some low 12's :D
ohh well, it was just an idea, I still dont know what I want to do yet. It sucks because there is nothing for the average joe, becuase some people just have too much money to spend on thier toys.
SNEAKY
12-27-2002, 07:47 AM
is there a restriction on retarding the cam?
Five Point Slow
12-27-2002, 08:08 AM
Why Restrict your car to a certain class, especially one that you will probably have no chance in winning?
Low 12's would be easy, put a 100 shot on it and call it quits.
SNEAKY
12-27-2002, 08:15 AM
Originally posted by Five Point Slow
Why Restrict your car to a certain class, especially one that you will probably have no chance in winning?
Low 12's would be easy, put a 100 shot on it and call it quits.
wel, BJ is like me, even if i run slower, if i can compete, thats funnier then just abusing your car for nothing. and who knows he could luck out and the other people reh light.
Jimbo
12-27-2002, 10:32 AM
Originally posted by Five Point Slow
Why Restrict your car to a certain class, especially one that you will probably have no chance in winning?
Low 12's would be easy, put a 100 shot on it and call it quits.
For fun. Racing in a competitive class is kind of exciting. I don't think BJ is going to travel cross country to compete in this class and a truly competitive car would cost upwards of 25k to build anyway. Its just the thrill of running fairly well in a competitive class. Its not as though he will be able to beat Burchum's or Robin Lawrence's cars, but being in the event and competing would be the thrill. I say why not, its the same reason you see guys running 14's and 15's in F/S every year.
aggie97
12-27-2002, 12:11 PM
BJ, there is an article in one of the mustang mags this month, January, answering all of your questions about factory stock. There are guys running 370 rwhp on a stock cam and heads with $30k in the engine and car. Running low 12's are much more easily done with high quality parts that you could always use on the 347 when you build it.
those times on stock parts is mucho cool, but sanity should prevail at some point in time. Get yourself a nice set of afr 185's, the cam to match and an intake that can bolt right onto that 347 so you are not spending money 2 or 3 times. That is what I am doing right now. Going to build a nice 4.6 NA and then boost it, or save money for the 5.4 32V. I am getting closer to all the solutions for that swap, I think, and it is just a matter of time and money. If I go that route, I am building a Cobra R for much less and I will have A/C and a radio. It will also not be red!!!!
doing more with less has status, but come on, don't you want to go really fast??!!!:D
Five Point Slow
12-27-2002, 12:22 PM
But the thing is, he wont be that Competitive unless he spends an excessive amount of money on things that are only gonna gain half the power that he could be gaining from the same mods but only better (without restrcitions)
How many times will You be able to race in this class a Year? Once? What happens when u line up against the #1 Qualifier in the first round, pretty much a waiste since u really had no chance from the beginning.
Why not build a heads/cam/intake/bottle car for waay less and just compete in some type of bracket racing since you are good driver (from what you apply everywhere)
Atleast pick True Street, you're guaranteed 3 runs, more than you'll probably ever see from this class.
Jimbo
12-27-2002, 12:30 PM
Originally posted by Five Point Slow
Atleast pick True Street, you're guaranteed 3 runs, more than you'll probably ever see from this class.
True.
ken cryder
12-28-2002, 11:43 AM
i thought the only difference between 40 p's and regular gt40 , was that the exhaust valve was 10% smaller . have i been misinformed?
can some one tell me the difference?
ken
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