turbo cams?
#11
becouse to do it right you need to spend time on a dyno and that costs 100's of dollars unless you know a buddy with a backyard dyno that will let you tune for free. I doubt any of us would get very far trying to dial in a cam for max power etc, raod tunning the car as appossed to dyno tunning it. All other tunning Fuel spark etc can be done on the raod with an *** dyno esp since we can change those settings on the fly with a aftermarket ECU. I know if i throw in cams i research on the theory and set it up for the best theoretical gains and look from there. Becouse i doubt i will get the time or money to properly dyno tune them in.
#13
Eliminator on .net got good results from his cams. Ultimatly i don't see this as a mod for people trying to go mild becouse well a stock or even a ported stock head and stock cams do a pretty nice job, of making power in the low to mid 300 hp range. If you aren't gonna go up there i would spend the money on a better WI system clutch, suspension etc.
#14
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I'll be upset if I don't see 15-20 hp out of my cams and gears compared to stock.
#15
Overlap isn't good for getting a turbo to spool, but some overlap is good as it helps to clean the combustion chambers of residual exhaust gases, and filing them with air and fuel instead. This extra air and fuel is more hp. You need some overlap to make good power. You need more to make power higher in the RPM range.
#16
Maybe for an NA engine. Atleast in theory, boost can compensate for those 20 degrees of overlap you have on a stock 1.6. Since we have DOHC we should be taking advantage of the ability to vary intake and exhaust independently. I dont know why many people haven't done that yet since cost-wise pulleys dont cost that much. A good place to start would be retarding the exhaust cam IMO. Of course the goal would be to pick up hp in the lower rpm range.
#20
B6T's are easy to find in the junkyard, just look for a Capri XR2. These cams should favor smaller turbine housings and/or wheels, and restrictive exhausts. Using an automatic Miata exhaust cam is an old GTX "upgrade" for more midrange torque. I think that'd work okay with a free flowing exhaust but I'd rather play with the B6T exhaust cam timing and just add a little bit of overlap.
Kia Sephia's and some MX-3's have a B6DE that's similar to a BP (CAS/dist is on the exhaust cam, injector bosses in the head). It might be possible to use those cams for a cam swap? Anyone measured them?
Does anyone have experience with 250* Mazdaspeed cams? Used them in a turbo engine?
Overlap let's the exhaust blow into the intake when backpressure in the exhaust manifold is greater than intake/boost pressure...
Kia Sephia's and some MX-3's have a B6DE that's similar to a BP (CAS/dist is on the exhaust cam, injector bosses in the head). It might be possible to use those cams for a cam swap? Anyone measured them?
Does anyone have experience with 250* Mazdaspeed cams? Used them in a turbo engine?
Overlap let's the exhaust blow into the intake when backpressure in the exhaust manifold is greater than intake/boost pressure...