V2Rocket

2v head is 82mm intake port length
4v head is 85mm...

where do you want your tuning "boost" to hit? to fill in a torque "dip", or to boost the high-end power (5-6k?)

Ducman82

I'm thinking Mid range. from what i understand closer the the head you get more throttle response or "snap" as it were, and more top end. farther way is more mid range. being this will be a street car I'm thinking more mid range.

mark kibort

jim, the races ive raced over the years have had 60 car fields and over 20 cars in class. ive been on the podium for most all races over the last 10 years and always in the top 3 for the champioinship points. thsi is about having fun, but if one race doenst have a race for me, its not a lot of fun.. so i did slow up to race wtih a transam car. actually let him by and tailed him to the end to try out new lines and push the car. this was not a race. sure, i beat 3-4 cars in the class, but again, no one showed.. what part of that dont you understand.

yes,ive competed against, and beat some the pure races, all have done pretty well in the pro ranks as well with proper funding.

mycar is about .5 seconds faster than my best, but the point of this was , that the better tires could fix about a 1 second deficit that ive been dealing with for the past 3 years. 1:37.xx best vs the 1:36s. the tires allowed me to run a 1:36 for 4 laps in a row.

back to the race. yes, the leader did lap me .. only because i gave up two laps to let the transam car catch up. but, its simple math. you run 1:30 and i run 1:36, its a matter of time , (30mins) before you lap me. he was superproduction by the way. do you think when the prototypes LAP the GT classes it takes anything away from their abilities or the quality of the car? of course not! you are just being stupid now!
as far as the pictures and video. those were to show the g loading of the car and the 991 (red GT3) is just in front of me at turn 5 and it shows him not far up front at turn 11. he was running 1:34-5 and i was running 1:35-6. .. on brand new slicks that cost as a set , more than a used 928! (not to mention his 500hp as well) I agree with you .. ive never seen such a low car count and i dont care if im beating a bunch of close competitors.. if you are in front, its boring. better to have close racing and i admit.. this was not the race for it. it was just a good first outing for the car and great to see how "newer" tires feel on the car too. now it gives confidence going into the race weekend with POC at willow springs.

so, lets be clear... ITE or there classes ive run and podium in , are usually between 10 and 20 cars, and thats easy to show if you really care. AND the time of 1:36, if you dont think thats pulling Gs, think about how the forces are different vs anderson with 200more hp running only 1 second faster. if that is the case, then the Gs im pulling have to be greater... its simple.
when he ran his world challenge race without the 500hp, but 410hp, he ran 1:40 at the same weight as me (but lots of other advantages). i ran that same time with near 100 less hp! again, more g loading.

So, lets look at the guys that have been in my races that ive raced with in a second a lap, and/or beat.
pobst, richmond (wcTourning winer), gavin, (WCGT fast lap award), mumford. (WCGT winner), sofronas, Warren, davis, Assayan, and a bunch of others... when the ITE group was in its hayday from 2001 to 2009, there was a bunch of guys that took this very serously. i had very good luck and podiumed most every race and even won a few. this was some great racing and a heck of a great time. Jim, many of these races are on line, so you can go watch them to see if they meet your standards (for which you have NEVER raced and are just an arm chair quarterback here) .

the point is the 928 is not an accepted race car. but we take pride in thinking its one of the best cars ever made, even though its 30 years old. but, i wave the 928 flag and show that the car is capable and does pretty well with some tweeks and for a lot less money, can race competitively in the current classes in the racing world TODAY, in club racing.

Imo000

Kibort, there you go with the "We" again!

mark kibort

regardless if you like what i do with the 928, there are plenty that take a little pride in the fact that its impressed a lot of people on the track and many that own them like the fact that the platform can do so much with so little modification.
so "we" might just mean "us" and not YOU!

James Bailey

So getting back to the real issue.....the improved intake. What about that Salsbury 4850 D modified as your intake plenum ??? It has been brought up several times already. Others have pointed out some of it's features.

mark kibort

can you send me a picture of what it looks like?
what ever happened to the molds for threshie's intake. i had someone contact me with a price a few years ago, and i forgot who it was. although, i really think we can do this on top of the stock "u" and use near stock or modified components off that. (i.e. maybe larger MAF like joe fan and Marks, and oversized external throttle body.)

another major gain, "if you want to race with the big fish" for POC racing, is that they penalize the larger HP , bigger engine heavier cars. pretty sad, but its the way they have been for many years. i fought and got some rules changed back in the early 2000s, but now, i have to go at it again, to change the GT class rules.
basically, they are trying to help equalize the field by taking some of the flatter HP curve competitors engines, and bring them back down to that of a higher strung engine characteristic. so, they are averaging HP and torque.. im in dialog now to change that, but until then, this INTAKE PROJECT is a good one, as it will yield some great HP gains and get rid of the higher torque levels that are numerically higher than HP. Like my engine is 375rwhp and 405rwt, I would prefer it to be closer to 380 rwt at peak to get around this rule... otherwise, i compete with guys with the same hp weight ratio, but i have to add 100 more lbs to my car because my adjusted HP is now increased to 390rwhp, which it doesn't have the effects of having. (not to mention the close rato gear boxes for 911s that have the same advantage the are trying to equalize)

Mongo

So, can we channel this frustration and debate into putting something down on paper at least to design later???

Imo000

Start doodling dude!

Mongo

You seem to have more free time from what I have seen on here with your bickering with Mark. I'm a little indisposed today.

GregBBRD

I'll post all the technical drawings and solid model work that Hans is doing when I get done with my manifold in a month or two.

Make it way easier for people to copy....

mark kibort

lets send it to my manufacturer in china and he can make 1000 of them for cheap! (ahem, after we give him $30k for making the tooling. )

dr bob

Thanks for stepping up for the tooling costs, Mark! Greg does the design and modeling work with Hans, you pay for the tooling, soon we will all be able to get better intakes for cheap! Be sure to check the options box for interchangeable tooling for lower runner size options for us please.

GregBBRD

And options for smaller plenums, different plenum "tops" for the smaller runners, smaller intake stubs to accept the smaller runners, and smaller throttle body openings.

Nothing to it!

Mongo

This is starting to sound good so far.