ida or side draft carbs and autocross!!!!
10-04-12, 10:37 AM
#76
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not a bad price. sucks they heat cycle out quickly out it is a competition tire not a normal street tire. so probably mount them on the race rims and keep something else for street use. have you used the R1R's? it says they were originally meant for autocross use but people have been using them for track days. im building for autocross so it might be a better choice for me? any experience?
10-04-12, 11:04 AM
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if you haven't seen it https://www.rx7club.com/naturally-as.../#post11242948
10-05-12, 08:16 AM
#78
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Regarding the number of bins for a fuel map... Really, I could have one bin at 4000 and another bin at 9000 and let the computer extrapolate everything in between, because the map is a flat slope between those ranges. The only weird curves are at the very low end where I need to have rich sections for drivability and lean sections for fuel economy.
Downside of running AFRs like that is when you fill up in Illinois and you get a tank of something that has the ignitability of watered down kerosene, the car runs like dog poo.
Downside of running AFRs like that is when you fill up in Illinois and you get a tank of something that has the ignitability of watered down kerosene, the car runs like dog poo.
10-05-12, 08:37 PM
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9jfd3s, thanks for your input on tire choice. i'm going to dig into performance tires more int he future. until then.....
btw, not sure why the semi pp exhaust thread was shared, but i read the whole thing anyways and am very surprised at how difference much the rb pre silencer really makes! i hadn't given them much thought but i think i will now. thank you for that.
peejay, how much of a difference do you think having a 10x10 (ms2) or 12x12 (ms3) fuel maps would make over the 8x8? it sounds like your not too far off from great with the 8x8 maps. i understand bad fuel. i had gotten a tank of water from a BP a few years back. had to clean out the tank, blow through the fuel lines and replace the filter and clean the injectors. it was a painful gas station trip. unfortunately the bill was paid on someones els's credit card and he had lost his receipt and refused to help me
it sucked.
btw, not sure why the semi pp exhaust thread was shared, but i read the whole thing anyways and am very surprised at how difference much the rb pre silencer really makes! i hadn't given them much thought but i think i will now. thank you for that.
peejay, how much of a difference do you think having a 10x10 (ms2) or 12x12 (ms3) fuel maps would make over the 8x8? it sounds like your not too far off from great with the 8x8 maps. i understand bad fuel. i had gotten a tank of water from a BP a few years back. had to clean out the tank, blow through the fuel lines and replace the filter and clean the injectors. it was a painful gas station trip. unfortunately the bill was paid on someones els's credit card and he had lost his receipt and refused to help me
it sucked.
10-05-12, 11:28 PM
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9jfd3s, thanks for your input on tire choice. i'm going to dig into performance tires more int he future. until then.....
btw, not sure why the semi pp exhaust thread was shared, but i read the whole thing anyways and am very surprised at how difference much the rb pre silencer really makes! i hadn't given them much thought but i think i will now. thank you for that.
peejay, how much of a difference do you think having a 10x10 (ms2) or 12x12 (ms3) fuel maps would make over the 8x8? it sounds like your not too far off from great with the 8x8 maps. i understand bad fuel. i had gotten a tank of water from a BP a few years back. had to clean out the tank, blow through the fuel lines and replace the filter and clean the injectors. it was a painful gas station trip. unfortunately the bill was paid on someones els's credit card and he had lost his receipt and refused to help me it sucked.
btw, not sure why the semi pp exhaust thread was shared, but i read the whole thing anyways and am very surprised at how difference much the rb pre silencer really makes! i hadn't given them much thought but i think i will now. thank you for that.
peejay, how much of a difference do you think having a 10x10 (ms2) or 12x12 (ms3) fuel maps would make over the 8x8? it sounds like your not too far off from great with the 8x8 maps. i understand bad fuel. i had gotten a tank of water from a BP a few years back. had to clean out the tank, blow through the fuel lines and replace the filter and clean the injectors. it was a painful gas station trip. unfortunately the bill was paid on someones els's credit card and he had lost his receipt and refused to help me
it sucked.the 3" RB presilencer is good, the only real "problem" is that it limits you to a short header, which may actually end up working fine, so it might not be a problem.
10-06-12, 08:07 PM
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as far as exhaust, this is the setup im planning to use (12th post down by 1200wag)
AusRotary.com • View topic - delete
as far as the resonators go, as shown in these pics, maybe instead of using 4 resonators i could use 2 rb pre silencers (which do you think will flow better, 4 straight through resonators or 2 pre silencers?) and then out to my nz muffler. that exhaust set up is commonly used on big 300rwhp pp race engines in nz with only 95db exhaust (as required over there in nz). so i assume it should be high flowing enough and be quiet enough for street and track use here in fl
as far as tires go, im still deciding on wheel size, but think im going to stick with 15's. i can't justify stepping up to a larger rim when it includes adding 4-5lbs per wheel. vert wheels look good and only weigh 13lbs. not many wheels are that light until your able to pay 1500 bones on a set of wheels, just doesn't seem worth it to me.
AusRotary.com • View topic - delete
as far as the resonators go, as shown in these pics, maybe instead of using 4 resonators i could use 2 rb pre silencers (which do you think will flow better, 4 straight through resonators or 2 pre silencers?) and then out to my nz muffler. that exhaust set up is commonly used on big 300rwhp pp race engines in nz with only 95db exhaust (as required over there in nz). so i assume it should be high flowing enough and be quiet enough for street and track use here in fl
as far as tires go, im still deciding on wheel size, but think im going to stick with 15's. i can't justify stepping up to a larger rim when it includes adding 4-5lbs per wheel. vert wheels look good and only weigh 13lbs. not many wheels are that light until your able to pay 1500 bones on a set of wheels, just doesn't seem worth it to me.
10-06-12, 09:24 PM
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15's are good, shorter is better
95DB is quiet, but it does depend on where and how you measure it.
for example in feb my friend and i both got flagged for sound over 103DB, the next time he went back it was under 103db with no changes, except it wasn't cloudy.
but yeah if you do an exhaust like that it'll flow AND be quiet
95DB is quiet, but it does depend on where and how you measure it.
for example in feb my friend and i both got flagged for sound over 103DB, the next time he went back it was under 103db with no changes, except it wasn't cloudy.
but yeah if you do an exhaust like that it'll flow AND be quiet
10-07-12, 09:27 AM
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that's not the first time i've heard of a cloudy sky causing the exhaust to read louder. im not for sure how the clouds make a difference but i have heard that a few times. it's strange but who knows?
yea that's the exhaust set up i've been planning, im having some trouble finding the non fiberglass packed straight through aluminum resonators online. still have some time though.
about to get started on de powering a steering rack. never done this before but i have a walk through with pics and everything so should be cake
yea that's the exhaust set up i've been planning, im having some trouble finding the non fiberglass packed straight through aluminum resonators online. still have some time though.
about to get started on de powering a steering rack. never done this before but i have a walk through with pics and everything so should be cake
04-26-13, 07:57 AM
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Holy thread revival, but its mine and in that since should be okay.
So my bridge port engine is currently being ported (finally) and i have decided to go with a wrap around stule side draft dell'orto set up. Its currently running on my 6 port engine but the brodge port is a turbo 2 4 port engine being buily built na. When i had first made the decision to go with the wrap around intake i made that decision for increased mid range tq and to lower my power band with the bridgeport engine after doing a lot of home work i figured it was a food idea. I had at that point found a nice wrap around intake manifold online for the turbo 2 4 port engine and had book marked the page. Unfortunately i lost that book mark and cannot for the life of me find another wrap around manifold for the turbo 2 engine. Racing beat used to sell the turbo 2 custom lower (nice smooth runners into the engine) to match their upper weber adapter manifold bit that isn't even listed anymore. The one i had found previously though was a one peice wrap around manifol like you see for the older 13b or 12a engines.
Does anyone know where i can find a wrap around intake set up for a turbo2 engine?
Does anyone know if an old school 13b 4 port manifold could be port matched o fit a turbo2 engine? (Im planning to order lower intake gaskets for and older 13 b 4 port and a turbo 2 and see much of a diference there is but if anyone already has this knowledge it would be greatly appreciated)
Now to clear things up, i decided to go with the dellorto carb over weber after seeing a flow chart showing that a 48mm dell flows a much cfm of air as a 51mm weber. And even if that info is false (though i found it on a few different sites at least i still have a nice out of production carb that people can drool over
yea it sucks ordering parts from italy and waiting for them but i knew that was going to happen before i bought it.! So please don't try to convince me that webers are better, i own a very nice racingbeat original carb that is in amazing condition.
Any info on an intake manifold would be greatly appreciated. Thanks guys
Ps: i figured i would pot here before starting a new thread. If it doesnt getbme anywhere then i will start a new thread
So my bridge port engine is currently being ported (finally) and i have decided to go with a wrap around stule side draft dell'orto set up. Its currently running on my 6 port engine but the brodge port is a turbo 2 4 port engine being buily built na. When i had first made the decision to go with the wrap around intake i made that decision for increased mid range tq and to lower my power band with the bridgeport engine after doing a lot of home work i figured it was a food idea. I had at that point found a nice wrap around intake manifold online for the turbo 2 4 port engine and had book marked the page. Unfortunately i lost that book mark and cannot for the life of me find another wrap around manifold for the turbo 2 engine. Racing beat used to sell the turbo 2 custom lower (nice smooth runners into the engine) to match their upper weber adapter manifold bit that isn't even listed anymore. The one i had found previously though was a one peice wrap around manifol like you see for the older 13b or 12a engines.
Does anyone know where i can find a wrap around intake set up for a turbo2 engine?
Does anyone know if an old school 13b 4 port manifold could be port matched o fit a turbo2 engine? (Im planning to order lower intake gaskets for and older 13 b 4 port and a turbo 2 and see much of a diference there is but if anyone already has this knowledge it would be greatly appreciated)
Now to clear things up, i decided to go with the dellorto carb over weber after seeing a flow chart showing that a 48mm dell flows a much cfm of air as a 51mm weber. And even if that info is false (though i found it on a few different sites at least i still have a nice out of production carb that people can drool over
yea it sucks ordering parts from italy and waiting for them but i knew that was going to happen before i bought it.! So please don't try to convince me that webers are better, i own a very nice racingbeat original carb that is in amazing condition. Any info on an intake manifold would be greatly appreciated. Thanks guys
Ps: i figured i would pot here before starting a new thread. If it doesnt getbme anywhere then i will start a new thread
10-06-14, 09:36 PM
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Holy thread revival, but its mine and in that since should be okay.
So my bridge port engine is currently being ported (finally) and i have decided to go with a wrap around stule side draft dell'orto set up. Its currently running on my 6 port engine but the brodge port is a turbo 2 4 port engine being buily built na. When i had first made the decision to go with the wrap around intake i made that decision for increased mid range tq and to lower my power band with the bridgeport engine after doing a lot of home work i figured it was a food idea. I had at that point found a nice wrap around intake manifold online for the turbo 2 4 port engine and had book marked the page. Unfortunately i lost that book mark and cannot for the life of me find another wrap around manifold for the turbo 2 engine. Racing beat used to sell the turbo 2 custom lower (nice smooth runners into the engine) to match their upper weber adapter manifold bit that isn't even listed anymore. The one i had found previously though was a one peice wrap around manifol like you see for the older 13b or 12a engines.
Does anyone know where i can find a wrap around intake set up for a turbo2 engine?
Does anyone know if an old school 13b 4 port manifold could be port matched o fit a turbo2 engine? (Im planning to order lower intake gaskets for and older 13 b 4 port and a turbo 2 and see much of a diference there is but if anyone already has this knowledge it would be greatly appreciated)
Now to clear things up, i decided to go with the dellorto carb over weber after seeing a flow chart showing that a 48mm dell flows a much cfm of air as a 51mm weber. And even if that info is false (though i found it on a few different sites at least i still have a nice out of production carb that people can drool over yea it sucks ordering parts from italy and waiting for them but i knew that was going to happen before i bought it.! So please don't try to convince me that webers are better, i own a very nice racingbeat original carb that is in amazing condition.
Any info on an intake manifold would be greatly appreciated. Thanks guys
Ps: i figured i would pot here before starting a new thread. If it doesnt getbme anywhere then i will start a new thread
So my bridge port engine is currently being ported (finally) and i have decided to go with a wrap around stule side draft dell'orto set up. Its currently running on my 6 port engine but the brodge port is a turbo 2 4 port engine being buily built na. When i had first made the decision to go with the wrap around intake i made that decision for increased mid range tq and to lower my power band with the bridgeport engine after doing a lot of home work i figured it was a food idea. I had at that point found a nice wrap around intake manifold online for the turbo 2 4 port engine and had book marked the page. Unfortunately i lost that book mark and cannot for the life of me find another wrap around manifold for the turbo 2 engine. Racing beat used to sell the turbo 2 custom lower (nice smooth runners into the engine) to match their upper weber adapter manifold bit that isn't even listed anymore. The one i had found previously though was a one peice wrap around manifol like you see for the older 13b or 12a engines.
Does anyone know where i can find a wrap around intake set up for a turbo2 engine?
Does anyone know if an old school 13b 4 port manifold could be port matched o fit a turbo2 engine? (Im planning to order lower intake gaskets for and older 13 b 4 port and a turbo 2 and see much of a diference there is but if anyone already has this knowledge it would be greatly appreciated)
Now to clear things up, i decided to go with the dellorto carb over weber after seeing a flow chart showing that a 48mm dell flows a much cfm of air as a 51mm weber. And even if that info is false (though i found it on a few different sites at least i still have a nice out of production carb that people can drool over
yea it sucks ordering parts from italy and waiting for them but i knew that was going to happen before i bought it.! So please don't try to convince me that webers are better, i own a very nice racingbeat original carb that is in amazing condition. Any info on an intake manifold would be greatly appreciated. Thanks guys
Ps: i figured i would pot here before starting a new thread. If it doesnt getbme anywhere then i will start a new thread
How has the setup been working for you in autocross events?
Gary
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