Highbredcloud said:I'm running stud mount rockers...The heads have been milled to 54cc...The cam is the same cam that Dave (5spdGT) is running...so you can ask him how he likes it... to get a second opinion...Yeah...you're right about the timing...its set at 18*...haven't really had an opertunity to "tune" the car since I only drove it once after I put everything in...(no insurance and a dead battery ) My block has also been zero decked so my compression should be something like 10:8 or 11:1 with those heads...its also a 306.
Very nice. I don't know the specifics of the cam, but if it's one of ed's more aggressive ones, you'll have no problem knocking down the 11 second barrier.
ITS HARD to believe...regardless. Here's why...for an equal comparisson Tmoss has a dyno graph somewhere on his site of a car I believe Rio5.0 which consisted of Tmoss ported stock lower and Thumper heads...Tom ported my lower Cobra so I know and compliment his worksmanship...I never saw a set of Thumpers before so I can't say...BUT from what each claims Tom's ported lower will flow in the neighborhood of 190-195cfm if not a little more...A stock Cobra only flows 200-205cfm...and Thumpers claims his heads flow over 200cfm on intake and 170cfm or so on the exhaust maybe more...POINT is Rio5.0 car didn't dyno more than 260RWHP...I don't think anyone with Tmoss/Thumper setup have dynoed at more than 260RWHP...although I could be wrong...Even Tmoss him self with slightly ported P heads and his ported Explorer intake is in the 280RWHP...
I understand your criticism and your argument makes a lot of sense.
SO how can 25thMustang make 272RWHP with stock E7TE heads with ONLY GT-40 valves and a stock Cobra intake and LT's? STOCK 93 Cobras dyno at 235-245RWHP. I personally saw one on the same dyno as my car on the same day at fun ford weekend 2-3 years ago...
You say you already know about these "stock" cars, but just in case. Read the regs - they're pretty enlightening: http://www.nmraracing.com/rules/factory_stock/default.htm
There are so many little things that add up to make more power. Now, I don't know exactly how 25th made his power, but little tricks all add up. 25th has said that he runs unported heads, but are they milled? According to the rules, the chamber volume need only be 52ccs - this increases compression. Dynoing with lighter wheels and tires will show an improvement, roller rockers are going to gain a few ponies over the stamped ones in the cobra, how much timing do stock Cobras run? A head with an efficient combustion chamber can run higher timing. His headers are going to pick up nicely over the stock "shortie" headers. Stock 5.0 HO cams are more aggressive than the Cobra Cams were. Stock Cobras still run the silencers. Let's also not forget that the induction tract on the stock 93 cobras is restricted by a both a limiting TB and MAF. I think his combo had better be stronger than a 93 cobra or he's not going to be competitive. I'm no expert, but these are some of the things I'd be doing .
NEXT: There's a memober on here...Millhouse...you might have heard of him before...that runs 13.4...at 101MPH in his 89 notch...with only a Performer intake and full exhaust along with 3.73's...I question his times as well at times...but that is more believable than 25thMustang's times...Years ago my buddy's brother had a 91 notch...with 3.27 on a full dynomax exhaust with O/R H pipe...running 14.1...and he powershifted the s*it out of it...
Interesting. I had an 89 hatch with 2.73s that ran 14.2s stock with 130,000 miles. The only changes made over the course of its lifetime were swapping the rusted out mufflers for glasspacks, Radial T/As, and replacing the paper air filter with a K&N. Factory timing, still had the air silencer, etc...
ask Mike (Grn92LX)...what he ran in his TW combo BUT with an FTI cam...I believe it was 12.7 @ 109MPH...(I thought you were hookin' Mike? )
I've known Mike for a long time. Not sure if that's exactly his times, but close enough. It's just not fair to compare this sort of time with 25th, though. The biggest problem with the comparison is that while 25th is nailing 1.6 60's, Mike was not nailing the 60's (sorry mike...TFS heads'll do that to you )
Before my AFR swap...I had CNC ported GT-40's...with TW stage II cam and a ported Cobra lower...I never took it to the track but that car was easily low 13's high 12's...I out ran my buddy's car by 3 car lenghts...who runs 13.6...I sold the heads to Lynx331 on here...who has a 87GT running those heads...stock Cobra intake and AFM N-21 cam...with slicks he ran a 13.5 @ 95MPH...with 1.6 60ft...with stock MAF and stock injectors...(his car is converted to MAF from SD)...you could see why I have trouble believing his times...
Again...I've seen those so called "stock" cars before...
Hey, you don't have to tell me. I had GT40X heads with a cobra intake, and a comp shelf cam that only made 270rwhp and 310rwtq. I still find no need to question the reality of 25th's claims.
Chris