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| Q & A -- Engine Components http://forum.44cup.com/viewtopic.php?f=7&t=225 |
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| Author: | Director [ Fri Mar 12, 2010 10:27 am ] |
| Post subject: | Q & A -- Engine Components |
Just some clarifications on the rules relating to engine components: Question: Are non-OEM alkernators and starters permitted? Answer: In the intereste of expense and weight reduction, we are allowing aftermarket alternators and starters even if not originally designed for the 944. We see no performance advantage. As I understand, alternators for the saturn SL 1, 88-89 cavalier , 96 camaro 5.7l will fit with about 10 minutes work to make them fit, a bit of grinding between the mounting ears, clearance between bracket and alternator and you need to drill out the back mounting hole. |
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| Author: | Director [ Wed Apr 21, 2010 8:23 am ] |
| Post subject: | Re: Q & A -- Engine Components |
Q: Can any Turbo engine parts be used in a normally aspirated engine ? A: We have allowed 944 Turbo engine parts to be used for reliability and availability reasons in some instances where the parts provide no performance advantage, including Turbo connecting rods and Turbo cylinder heads. |
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| Author: | johntorg [ Wed Apr 21, 2010 10:16 am ] |
| Post subject: | Re: Q & A -- Engine Components |
I believe turbo valve springs are pretty commonly used. |
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| Author: | Director [ Thu Apr 22, 2010 7:38 am ] |
| Post subject: | Re: Q & A -- Engine Components |
johntorg wrote: I believe turbo valve springs are pretty commonly used. Yes, good point John. Turbo valve springs is this allowed category. |
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| Author: | GregF [ Fri Apr 23, 2010 2:41 pm ] |
| Post subject: | Re: Q & A -- Engine Components |
I am pretty sure that no one on this subject has installed a 951 head onto a 944. A 951 head with the ceramic knocked out of the exhaust port is good for 20 plus HP. It would not be allowed under IT prep or PCA stock/prepared rulesets, so why would there be a special allowance made here? Greg F |
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| Author: | GregF [ Fri Apr 23, 2010 7:24 pm ] |
| Post subject: | Re: Q & A -- Engine Components |
Would the Turbo intake manifold be allowed as well under the same assumption that it would be reliable and available? I think the groups interests would be much better served by allowing 951 cranks, con rods and valve springs and not allowing the parts that most certainly raise the performance of the car and are no more available than the standard O.E. parts. Greg F |
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| Author: | Director [ Thu May 20, 2010 8:04 am ] |
| Post subject: | Re: Q & A -- Engine Components |
GregF wrote: Would the Turbo intake manifold be allowed as well under the same assumption that it would be reliable and available? I think the groups interests would be much better served by allowing 951 cranks, con rods and valve springs and not allowing the parts that most certainly raise the performance of the car and are no more available than the standard O.E. parts. Greg F Engine builders I have spoke with see no measurable difference with the turbo head. Have not heard of any availbility or reliability issues with intake manifolds -- non consumable item. |
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| Author: | spoiler [ Thu May 20, 2010 4:03 pm ] |
| Post subject: | Re: Q & A -- Engine Components |
I have talked to John Milledge about using a turbo head on a na motor and he indicated as Greg does that there is a lot of HP that can be gained that way.We did not talk about particulars like breaking out the ceramic.But he made it sound as if it were better in stock configuration.This is easy to check by looking at the part number.It should not be legal.Forged turbo rods are much heavier than cast na rods so I am sure they probably lose HP in favor of longevity. |
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| Author: | Director [ Thu May 20, 2010 5:33 pm ] |
| Post subject: | Re: Q & A -- Engine Components |
spoiler wrote: I have talked to John Milledge about using a turbo head on a na motor and he indicated as Greg does that there is a lot of HP that can be gained that way. We did not talk about particulars like breaking out the ceramic. But he made it sound as if it were better in stock configuration. Cant gain much from your exchange with Miledge as it lacks particulars. Greg spoke of gaining power by modifying the turbo head. Performance gains with the NA head can also he had by modifying, but that's not what's on the table. spoiler wrote: Forged turbo rods are much heavier than cast na rods so I am sure they probably lose HP in favor of longevity. Not true, neligble difference in weight. |
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| Author: | Director [ Thu May 20, 2010 5:58 pm ] |
| Post subject: | Re: Q & A -- Engine Components |
GregF wrote: I am pretty sure that no one on this subject has installed a 951 head onto a 944............ I think the groups interests would be much better served by allowing 951 cranks, con rods and valve springs .............. It would not be allowed under IT prep or PCA stock/prepared rulesets, so why would there be a special allowance made here? Greg F I'm not sure at all that a Turbo head hasnt been used on a 944 in the series. Not something we ever checked for. Are turbo rods and cranks, oil scrapers, windage trays, removal of the car interior, A/C and heating system, head lamps, etc. etc. allowed under IT and PCA rulesets? Does PCA and IT have HP and torque requirements that the monitor wwith use of dynos? We use much of the rules of scca and pca but Cup rules are not identical. We makes changes to pca and scca rules when we think it makes sense in an effort to build field sizes, level the playing field, make it easier to field a car, and allow drivers to tinker with their cars. During the course of the 9 years of the series, we continue to make changes we think make racing a 944 better. It's not a perfect system or ruleset, but hopefully we make more good decisions then bad ones based on the data we can collect. |
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