 new cam gears., good idea or not? |
 Jul 23, 2004 - 7:29 PM
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Enthusiast  Joined Jul 7, '04 From charlotte N.C. Currently Offline Reputation: 0 (0%)  |
so ive still got some money left over and im still looking to do some stuff to my car. and i was thinking of advancing my timing. from what ive read 12 BTDC will not cause a knock as long as i use a higher octane gas.
i was thinking about purchasing a pair of these http://www.aempower.com/product_cam.asp my questions are. one how much horsepower will i gain from advancing my timing? also i was just want to confrm that our cars run at 10 BTDC stock. any advice or tips would be much appreciated. This post has been edited by recneps: Jul 23, 2004 - 11:14 PM -------------------- Former: 96 GT 5 speed (i/p/e) Fate- rear ended by mack truck
00 GTS 6 speed (i/ Bored TB 63mm - 68.5mm w/ butterfly/ Ported IM/ IMG/ PFC/ Commander/ datalogit/ Ported & heat wrapped Header/ Decat/ UEGO/) 193FWHP 14.2(1/4mi) @98mph, 2.12 60ft (just intake, unbolted Exhaust, and gutted) Fate- side swipped by 18 wheeler at 75mph. Next: maybe an elise |
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Jul 26, 2004 - 1:40 AM
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 Enthusiast Joined Dec 27, '03 From Nor Cal Currently Offline Reputation: 0 (0%) |
I don't want to disappoint you, but I must point out some information for you first. All those who have attempted n/a 5SFE builds were all disappointed. The best I've seen was on the MR2 boards with a guy dynoing around 150whp (~170-180 hp at the crank). That's not bad... but considering the money involved... it's not as good as a turbo build, or a swap. On the topic of revving the 5SFE... well, that's not a good idea either. The rod/stroke ratio is not very good, and I just don't see the stock rods living beyond 8000 rpms (if even that), and the head, if kept with the stock valvetrain, won't even see that. As for the comparison, 5SFE has disadvantages to the 7AFE out of the box considering the 7AFE still maintains a decent rod/stroke ratio allowing it to potentially make much more horsepower in the higher rpms, not to mention it shares piston interchangeability with 7rib 4AGE's, which greatly increases potential for the 7A block (higher comp pistons for n/a builds, lower comp forged for turbo builds). The 5SFE, as far as I know, has very little aftermarket support, and its only serious advantage over the 7AFE, is its displacement. In both cases, they are most limited by the head design, which faults their n/a buildability. With a head swap, both have serious potential... but IMO, it'll all be a bit too expensive in terms of dollars per horsepower (speaking as one who wandered down that road before). Good luck on the build... and back on topic... an adjustable cam gear is not at all needed to perform cam timing adjustments in general... it just makes things easier... and I'll still maintain, all the less worthwhile with the cam set-up in the FE heads... ;] -------------------- "It's ok to be naked girl... I'm an artist!"
1995 AT200 Celica ST: stocked out daily driver... 1984 AE86 Corolla GT-SR5: silvertop 20V 4AGE project car jacked up with goodies... 1991 SW2x MR2 n/a: bare bones hardtop model soon to be... |
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Posts in this topic
recneps new cam gears. Jul 23, 2004 - 7:29 PM
spunky393 "ideal for heavily modified engines"
th... Jul 23, 2004 - 7:44 PM recneps yeah but well i figured that ya know intake, exaus... Jul 23, 2004 - 9:00 PM chucho i dont see anything for the 5sfe, they have stuff ... Jul 23, 2004 - 10:24 PM Kwanza26 There's only ONE cam gear in the 7AFE and 5SFE... Jul 23, 2004 - 11:43 PM spunky393 Good info Kwanza, i should've mentioned that Jul 23, 2004 - 11:54 PM Hanyo what does adjusting cams do for a car? Jul 24, 2004 - 1:04 AM recneps it advances the timings of the car and increases c... Jul 24, 2004 - 1:28 AM recneps how much adjustion do these cam gears allow for. w... Jul 24, 2004 - 1:33 AM Kwanza26 QUOTE (recneps @ Jul 24, 2004 - 6:33 AM) how much ... Jul 24, 2004 - 12:09 PM recneps ok Kwanza26 sorry bout that anyway i didnt know i ... Jul 24, 2004 - 1:07 PM Fox-N-It2 Ignition timing and cam timing are 2 different thi... Jul 24, 2004 - 5:08 PM Kwanza26 QUOTE (Fox-N-It2 @ Jul 24, 2004 - 10:08 PM) Igniti... Jul 24, 2004 - 5:51 PM recneps ok well thank you that answers my question sort of... Jul 24, 2004 - 6:09 PM Fox-N-It2 QUOTE (Kwanza26 @ Jul 24, 2004 - 10:51 PM) Correct... Jul 24, 2004 - 9:23 PM recneps QUOTE I would/will use a adj cam gear to bring th... Jul 25, 2004 - 12:29 AM spunky393 start a new post on that next quetsion AFTER you r... Jul 25, 2004 - 1:01 AM
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