01 srx vs 06 F7 Tony Stewart

LOOK, I DON,T WANT TO TURN THIS POST INTO THE F-7 DEBATE, BUT OF EVER THERE WAS A CHEATER SLED ALLOWED TO RUN IN ANY STOCK CLASS FORM OF RACING, IT WAS THE FIRESCRAP. NOT CATS FAULT, NOT YAMAHA FAULT, MY BLAME GOES ON OLD ISR WHO BY THE WAY RULED WITH A IRON FIST ON SLEDS THAT HAD A WEIGHT ADVANTAGE UNTIL THIS SNOWMOBILE CAME OUT IN 2003. 3:16 (yammie tony)
 

jabber800 said:
Tony with my son having purchased an 03 f7 I have done a lot of tinkering with them in the last year? 05/06 ecu has been set up differently than the 03. 03 had a terrible lean spot in mid range causing a lot of piston failures! The 06 box has richened the mid range and leaned out the top end giving a bit stronger top end. They can still be improved upon with a time key change and a fuel reducer. $75.00 in parts and a gain of around 4-5 hp. This combination makes them very strong runners. Now if the person wanted to run a
Race box things get even stronger. Huge timing changes down low tapering off on top end. Their on the edge but very fast. Best advice I could give anyone running a very fast F7 is to try to get him to hot lap the runs! If He has a race box it pulls out all the temp and timing retard features of the stock ecu. When he gets hot it will fail! Other than that if he's set up well you better have your A game you can't afford any mistakes in your set up if you want to be close.
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DAN, GUESS SOME OF MY INFO WAS CORRECT THAN. 3:16 (yammie tony)
 
mrviper700 said:
03 fall apart 7 was the one, it came with 10 tooth drivers on it, the later ones have 9 tooth drivers, track rolls alot easier, and no diamond drive on the 03's. All the records for speed runs are 03 fall apart 7's that I have seen.

sled is lighter with same and sometimes a little more hp, but it can only go a couple more mph faster then a srx , look at the records for yourself, its not like they are 120mph and a srx is 110mph. Its like 2mph.

Lets make the srx weight the same and see what the result is........

also, the fall apart7's seem to really have alot of variance as to the ones that run good, 1 out of 5, the other 5 are turds.......they are strange like that. :dunno:

World records:

2003 f7-116.599mph in 1000ft

srx700- 114.893mph in 1000ft,

thats 1.70mph differance for a way lighter sled vs the old srx.!!
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05 and 06 DD sleds had 10 tooth drivers. The original 03 proto types weighed 430, but that was revised by Cat and production modles were 450 lbs....the 06 weighed 460.

I have radared all years and your avereage 03/04 would run 110-112 in around 2000 ft. 05-06 DD sleds ran 114-118...same day, same distance.

I don't really care about records as they are in a more controlled setting with a nicely plowed track....I was just stating real world results with your everyday run of the mill sleds. The OP came on and started a thread about his results and some guys assumed the F7 must have been clutched or had work done...I'm simply saying the F7s run good top end aswell..stock ;)!
 
shaddow44 said:
05 and 06 DD sleds had 10 tooth drivers. The original 03 proto types weighed 430, but that was revised by Cat and production modles were 450 lbs....the 06 weighed 460.

I have radared all years and your avereage 03/04 would run 110-112 in around 2000 ft. 05-06 DD sleds ran 114-118...same day, same distance.

I don't really care about records as they are in a more controlled setting with a nicely plowed track....I was just stating real world results with your everyday run of the mill sleds. The OP came on and started a thread about his results and some guys assumed the F7 must have been clutched or had work done...I'm simply saying the F7s run good top end aswell..stock ;)!
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My post was just pointing out his race (this thread) was 1320ft. Your post stated at around 1300ft you pulled away. Even in your post a 1320 should be close. His race was done @ 1320ft.....I know knit picky but to bust our bubbles stating you pull away 2-3 lengths in 2000ft aint really busting any bubbles.
 
shadow, just cant believe you pulled as shipped production f7 out of the crate and beat a srx that had iantomassi set up the clutching and suspension. Those guys are good tuners. You even say in your same post about differnt weight clutch weights being the ticket, so I would guess your fingers were in there somewhere..lol. Otherwise you must have had a real ringer out of the crate then...

everyones sleds are always "stock"..... :hide:

for weights, even if i use your 450lb specs, the srx is 522 , thats still 72lbs.
thats the weight of the entire rear suspension from the yamaha. If you could remove 72lbs of weight from your current sled, would it be faster?
140hp vs 140hp, ok... no problem with a 2cyl or a 3 cyl, your choice. but now give you another 72lbs lighter yet , you cant compete in same class racing with weight differances like that.

Stock 700 srx had to weigh 750lbs, subtract 150lbs for the rider and the srx had to weigh 600lbs. Had to add weight at the races to make the srx weigh 600lbs, whats wrong with this picture?? I dont know the isr weight for the f7,but i can tell you this, it was at 1 time when i was racing was 80lbs weight break at first, then revised a couple times, no clue what it currently is.

I used the nssr records because they ARE in a controlled enviorment and the results will be more accurate and the tuners ability are more on par. Those sleds are dialed in,both the srx and f7.
Granted, these nssr sleds run better then your average f7 and srx will , likely the real world backyard results will be even slower,not faster. Your only talking about 2mph rounded off .


f7 is always a debate, always will be.....lots of pocket lining $$$$ went on with cat and isr on that machine.

its all good shadow, I am spent on the f7 debate, and its old news these days. ride on............ :sled1:
 
''LOTS OF POCKET LINING $$$$ WENT ON WITH CAT AND ISR ON THAT MACHINE ''. lol. PRETTY FUNNY. don, glad you posted that before me. i will say i saw skidoo do same ting when they released a snowmobile in the early ninties called the MACH1 -X. 3:16 (yammie tony)
 
mrviper700 said:
shadow, just cant believe you pulled as shipped production f7 out of the crate and beat a srx that had iantomassi set up the clutching and suspension. Those guys are good tuners. You even say in your same post about differnt weight clutch weights being the ticket, so I would guess your fingers were in there somewhere..lol. Otherwise you must have had a real ringer out of the crate then...

everyones sleds are always "stock"..... :hide:

for weights, even if i use your 450lb specs, the srx is 522 , thats still 72lbs.
thats the weight of the entire rear suspension from the yamaha. If you could remove 72lbs of weight from your current sled, would it be faster?
140hp vs 140hp, ok... no problem with a 2cyl or a 3 cyl, your choice. but now give you another 72lbs lighter yet , you cant compete in same class racing with weight differances like that.

Stock 700 srx had to weigh 750lbs, subtract 150lbs for the rider and the srx had to weigh 600lbs. Had to add weight at the races to make the srx weigh 600lbs, whats wrong with this picture?? I dont know the isr weight for the f7,but i can tell you this, it was at 1 time when i was racing was 80lbs weight break at first, then revised a couple times, no clue what it currently is.

I used the nssr records because they ARE in a controlled enviorment and the results will be more accurate and the tuners ability are more on par. Those sleds are dialed in,both the srx and f7.
Granted, these nssr sleds run better then your average f7 and srx will , likely the real world backyard results will be even slower,not faster. Your only talking about 2mph rounded off .


f7 is always a debate, always will be.....lots of pocket lining $$$$ went on with cat and isr on that machine.

its all good shadow, I am spent on the f7 debate, and its old news these days. ride on............ :sled1:
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Let me clarify a couple of things. The SRX was clutched by Iantomasi ( who I am friends with and who did work on my 99 SRX ) but the suspension was set up by the owner...it hooked up very well. My sled was bone stock the first season and at the time I raced my buddies SRX...my comment about clutching was just a general comment as the factory clutching was very close to being perfect...they over reved a bit. Iantomasi did clutch my sled the next season and that's all they need to do. My sled was impressive for a stock sled...my buddies was even better and ran 118 on hard pack..even Iantomasi recommended leaving it alone as it worked so well. After 3 seasons I did add a y-pipe and pipe but only noticed mid range gains...I never could get mine to radar faster than 114 mph.

Like I said before...I only commented because you assumed the F7 that beat the OP was clutched or had work done to beat an SRX...In my experience it's very possible for it to be stock...06's worked very well stock. YOu are also correct in that the lighter sled has an advantage...so maybe that is the case with the OP's race...the lighter sled one. Either way...it's a great rivalry between the two...and IMO, the best two 700s ever made.
 
mrviper700 said:
shadow, just cant believe you pulled as shipped production f7 out of the crate and beat a srx that had iantomassi set up the clutching and suspension. Those guys are good tuners. You even say in your same post about differnt weight clutch weights being the ticket, so I would guess your fingers were in there somewhere..lol. Otherwise you must have had a real ringer out of the crate then...

everyones sleds are always "stock"..... :hide:

for weights, even if i use your 450lb specs, the srx is 522 , thats still 72lbs.
thats the weight of the entire rear suspension from the yamaha. If you could remove 72lbs of weight from your current sled, would it be faster?
140hp vs 140hp, ok... no problem with a 2cyl or a 3 cyl, your choice. but now give you another 72lbs lighter yet , you cant compete in same class racing with weight differances like that.

Stock 700 srx had to weigh 750lbs, subtract 150lbs for the rider and the srx had to weigh 600lbs. Had to add weight at the races to make the srx weigh 600lbs, whats wrong with this picture?? I dont know the isr weight for the f7,but i can tell you this, it was at 1 time when i was racing was 80lbs weight break at first, then revised a couple times, no clue what it currently is.
:
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I agree on this 100%, the ISR shit the bed when these come out. I have given my fare share of F7's a run for their money over the years, but have also been beat by a few aswell.

Explain to me this scenario.

I attended a race a few years back in Quebec. Two fellas showed up with a Sno-Pro 440 and an F7. The 440 entered the stock 440,500, & 600 class and took 1st in all three. Then entered the IMP 440, 500, 600 and took 1st in both 440 & 500 while coming in 3rd in the 600. Then the F7 came out to shine by winning all stock classes 700-Open, then ALL (yes All) IMP classes 700-Open (including beating my IMP), and even taking 3rd in the PRO 700 and 4th in the PRO 800. I have the videos somewhere if I can find I will post, and yes there was alot of serious hardware their that day including some done up SRX, FIII, Machs, REV, XCR, TCat, ZRT, Viper, you name it, and not just your fly by night racer. Three people protested the F7 with the results being it was stock. I still to this day cant wrap my head around that. So WTF did he have to done for that kind of damage against some heavy $$$ machines???

Yes there are still a few, but one reason races are scarce in this area now is because everytime you showed up at a race, the field/lakes were flooded with green. Half of them sporting stock looking race parts (ie; boxes). And people were getting bored seeing F7 after F7 compete one another till the end, in result the number of competitors with other brands was less and less. And if theres nothing but firecats at the event, they may aswell save their gas and have a show and shine instead.
 
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