FP-HTA86 vs PTE-6765
Jan 7, 2011, 04:46 PM
#61
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I just found this :E85 has an octane rating higher than that of regular gasoline's typical rating of 87, or premium gasoline's 91-93. This allows it to be used in higher compression engines which tend to produce more power per unit of displacement than their gasoline counterparts. The Renewable Fuels Foundation states in its Changes in Gasoline IV manual, "There is no requirement to post octane on an E85 dispenser. If a retailer chooses to post octane, they should be aware that the often cited 105 octane is incorrect. This number was derived by using ethanol’s blending octane value in gasoline. This is not the proper way to calculate the octane of E85. Ethanol’s true octane value should be used to calculate E85’s octane value. This results in an octane range of 94-96 (R+M)/2. These calculations have been confirmed by actual octane engine tests." [6]
Jan 7, 2011, 06:33 PM
#63
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Gottcha! I thought it would be a greater difference being twice the price as e85 for e98. I back tracked the ethanol locally to Ohio where they can only legally sell you e98 under the offraod race clause or rule. The price per drum (55 gallons) is 293$. That's 5.33 per gallon. I thought the gains would be greater do to people spending twice the amount as e85 for the e98.
Jan 7, 2011, 06:48 PM
#64
I see alot of the racers only using E98 for added insurance at the track, just in case they got a bad tank of E85 from the pump. I've heard sometimes you actually get like E78 at the pump stations. Will this cause any major problems when going wot ? 
Jan 8, 2011, 07:18 PM
#70
Like AWDMike said, the power at 5500 is much greater on the HTA86 than the numbers listed for the Precison. The following sheet is the only one I could quickly find with a back to back comparison. I'm just not too sure which Precison Turbo the FS635 actually was. Notes call it a 6282 but these were early day tests that David was doing. This was only the 2nd HTA 86 made. The first to use a slightly modified compressor housing. The FS635 was being tested by DB at the time. Heres the post made by DB at the time of the testing, over 2 years ago.
The HTA86 does not peak at 7500. In fact, as the above chart shows, it can and will continue increasing power until 9500 rpms. The early lag was due to this particular pull being made before the intake cam was adjusted at lower rpm/boost. After the change, the actual power was above the FS635 (David, 6282??) from 4000 up. All pulls were stopped before 9k, but one of the pulls made 731whp before averaging. Not sure where the FS635 fit in the Precision lineup, but this at least shows same car, same dyno, same boost of the HTA86 and the FS635 (Precision 6282 is how it was 'noted' on the AEM maps.)
OK, we didn't actually destroy the dyno but he did just destroy every single other record we have set here on this dyno with a 35r based turbo.
The car is absolutely re-freakin-diculous!!
We had 9sec9's (Tom's) car here for the last three weeks as most of you know. He's been hanging out here breaking personal bests and other records as we go.
After breaking the stock appearing turbo record last week we quickly put on my turbo, the FS635, and on one good clean pass his car ran 9.20 at 157.5 mph on it. The car made 675 whp and 504 ft lbs at 42 psi of boost.
We installed the new HTA86 mm turbo yesterday when it showed up here overnight from Robert at Forced Performance.
Today at the same 42 psi of boost the car was loaded back on the dyno and ran again. It made an absolutely amazing 724 whp and 536 ft lbs of torque.
To put this into perspective, my RS made only 684 whp and ran a 9.04 at 159 mph.
Today is quite a bit better air and cooler than the last time the car was on the dyno. When we dyno'd the FS635 we had intake air temps starting at 91 and going up to 95 degrees for the pull. Today was about as good as you can ask for and the starting air temps were 51 going up to 52 degrees.
We are loading the car now to head to the track. We are running at D42 tonight, not the safest place to run a car that is this quick but Trent says he's up for it.
If all goes well and we meet our goals we are going to be posting about a pass the 8's and my guess is it will run over 160 mph.
Here is a dyno comparison of both turbos.
Have a great weekend everyone. We are hoping for a great night.
The car is absolutely re-freakin-diculous!!
We had 9sec9's (Tom's) car here for the last three weeks as most of you know. He's been hanging out here breaking personal bests and other records as we go.
After breaking the stock appearing turbo record last week we quickly put on my turbo, the FS635, and on one good clean pass his car ran 9.20 at 157.5 mph on it. The car made 675 whp and 504 ft lbs at 42 psi of boost.
We installed the new HTA86 mm turbo yesterday when it showed up here overnight from Robert at Forced Performance.
Today at the same 42 psi of boost the car was loaded back on the dyno and ran again. It made an absolutely amazing 724 whp and 536 ft lbs of torque.
To put this into perspective, my RS made only 684 whp and ran a 9.04 at 159 mph.
Today is quite a bit better air and cooler than the last time the car was on the dyno. When we dyno'd the FS635 we had intake air temps starting at 91 and going up to 95 degrees for the pull. Today was about as good as you can ask for and the starting air temps were 51 going up to 52 degrees.
We are loading the car now to head to the track. We are running at D42 tonight, not the safest place to run a car that is this quick but Trent says he's up for it.
If all goes well and we meet our goals we are going to be posting about a pass the 8's and my guess is it will run over 160 mph.
Here is a dyno comparison of both turbos.
Have a great weekend everyone. We are hoping for a great night.
