Also throw in reliability for not just the pulleys but the accessories and motor as well. This will have to be determined in the future. Only the C32 guys can attest to the reliability of motor and pulley of the 178 for more than 4 years. Everyone else is just over one year or less.

 

185 mm Pulleys:
Lars Sedell - SLK32, 11.973@115.703 with a 1.847 60' Street Tires

 

I was wondering when that was gonna show up.....

 

Still slower than ATLEAST three 178mm guys that I know of ! next.....

 

is anyone considering gas octane? or DA? or temperature? track prep? All these factors play a seriously role in your ET and trap speed. A more accurate way to compare it would be between the different setups at the same track at the same night or something (though i realize how difficult that would be to setup).

 

I've had my 178mm pulley kit for just a little over 2 years and have had no motor issues... now i probably just jinxed myself :-)

 

We should be good for a while, them C32's have over 100k and still pushing the 178.

 

This is without NeedsWings intake manifold.

 

Or high A/F ratio's. Shows how good one mod is huh?

 

AFR - 11.7, 5800 - 6200 rpm

 

We did that last year, it is discussed in this thread and there is a 20+ page thread on it in this forum section with the results as well. The battle of the sc pulleys event. A new one is set up for May this year as well.

 

first yes you can't compare ET, but you can reasonably compare MPH from track to track. Whats with the 5mph kick on the 181 comparo? 5mph is alot in the way of horsepower.

Also Someone should go back drag times / myslips and compare all there back 1/8 times. subtract the 1/8 mile et/mph from the 1/4 et/mph to see what the car "picked up" in the back 1/2. I think it's safe to say that the back half is almost all car and not driver. that way you can do a comparo factoring out the driver.

I've said it before, I think it's ALL in the tune. I'm sure the timing on the tunes the larger pulley's are seeing is basement level. Add to it the ecu is probably pulling out more timing because of charge air temps. I'll bet almost anything a 185+Sunoco+more timing would be the answer for some smack down times. My statement is further backed by the substantial gains these N20 cars see. the N20 cools the Charge air to the point the ecu starts adding timing back in to complament the larger pulley.

Stop chasing boost, 1 degree of timing is worth way more then a pound of boost...

 

Without seeing your mods, I have to assume you don't have a NW CAI? Still great AFR's and probably the best with the 185. Brian is the only other one in 11's(AFR's), but not sure what he recorded in TX. My point about the NW CAI is your not seeing max boost from your 185. If you do have one, then your farther along than most on here. Share your tuning or datalogs. I assume your datalogging if you know your afr's at those rpm ranges.

 

You can't compare track to track mph. Too many factors in between. My best mph is not my best time, i.e. tire spin... I only say it 20 times a day. DA is the only balancer of how your run can be compared to someone else. Regardless of mods, what you run and when you run it ,all comes down to DA. Even the NHRA struggles in Denver

 

meh unless your spinning really bad your MPH should stay somewhat consistant, I mean this is a lock up automatic... But again the back 1/8 mph is a direct reflection of HP.

 

I tend to agree with everything you are saying. I also believe it is all in the tune. I had 43 deg weather last night with a negative DA. I should have been flying right? Wrong, I actually slowed up because I'm running out of fuel in the tune! If I was able to adjust the tune at the track, I guarantee I would have been a ton faster.

 

1 mph is a big accomplisment when your down to the nitty gritty. Setting a baseline at let's say 115mph to gauge whether your in the ball park is pretty general. I can guarantee you the better the 60' the lower the mph, higher the 60' and higher the mph. This doesn't reflect your overall et either, my best et is with a mediocre 60'. The lockup automatic doesn't offer any help if you can't launch. My highest mph is somewhere near 118, does that set a bar? No unless I match that with a low 11.80 all it means I wasted a good pass.

1/8 mile tracks don't give you any valuable information for our cars, other than 60' times. I've posted in another thread and proved it with timeslips that our car pulls equally to a 10 second car from the last 400'. So the 1/8 mile will leave you guessing especially with the different pulleys. Each has a different powerband. My theory is the 178 is for the bottom end, the tune for mid range, and the nw intake for the top end because of the increased air flow. It's a winning combo and each setup needs to find it to work.

 

lol read my post again, I said "Back" 1/8.

I also agree with you 100%. Spinnign kicks your MPH up. The Best MPH we ever hit on the Red Sled was 166mph and that was actually done on our smaller 25" slicks, compared to our normal 158 on 26" slicks. The car spun so bad it left 2 black marks from the pad to the 330 cone. Our best ET's always have the best 60's and lower mph's. Again I'm not arguing with you I'm agreeing with you. It's simple understanding, the more you spin the quick you plug the gears and the sooner you end up in high gear to crank up that MPH and take advantage of the gearing.

If you deduct the 1/8 times from the 1/4 times you get the back 1/2 times and those don't change much from run to run unless you pumped more power into the car.

Again the Red Sled will run a solid 3.1X back 1/8 on any strong run be it a 9.316 or a 9.613. Only time we see the back 1/8 drop is when we throw more power at it, timing or boost. We have even made drastic gearing changes. but the back 1/8 et does not change.

I'm to lazy to do it but seriously, go pull up the back 1/8 et's for those cars.

 

I did some digging and found the old thread for the US 41 event, if anybody had not seen it.
https://www.crossfireforum.org/forum...3&highlight=41

 

This is my friends car. Lars. Known as StarCar on this forum.
We both have SLK32. Same setup. Except, he has schrick cams and i
Kleemann´s cams. DIY NW style intake. ( different intake pressure 0,24 bar,
3,48 PSI, between SL55 Y-pipe and green filter, in my car ) Inside 3´
Cooling system separated. Johnson 30 pump.
LET 185 mm pulley, Feritta Race system, with two - 100 cells cats.
World biggest HE. Bigger than Needswing new Super HE.Cooling down in 10 sek, when you let of the trottel. Back to crousing temp.
First day at tuning both hit MAP sensor limit. Day three everything was fixt
by a German fellow, T.M. Chiptuning. Dont know how he fixt all problem.
No limp mode or nothing. Intake pressure 21 - 22 psi. Before we hit the MAP sensor limit all day.
Now the car is running as he...
We tried to Dyno Lars car but there was to mutch slip on the tires.
The only thing we checked was the AFR. And there where no problem.
11,7 AFR. My car is between 11,6 - 11,7 - 6400 rpm. RPM Limit is from Kleemann.
Next run is in May. With Needswings intake manifold and VRP Headers.
And Hoosier tires. Interesting.
By the way. My car is faster than he's
This is going to be big fun.

/Göran