Subject	Ferrea oversized valves... Dual coil valve springs etc(Ash?)
Posted by	Shawn300zTT GT28R MD on February 27, 2006 at 9:55 AM
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Message	With my current build I am going with -GT2871-1 turbos -Eagle H beam rods -CP or Wiesco forged pistons 60mm TB's, 2.5" IC piping ARP head,Main studs methanol injection MS cast iron manifolds Dual PLX wideband 02's Dual EGT's etc etc.. ( you get the idea) As for the heads.. I am porting them out myself. just opening them up a bit. I am considering getting larger valves to get some more air through the motor.. I have been highly considering the Ferrea 1mm oversized valves, Dual coil valve springs, ti-retainer kit. I am worried about the streetability of 1mm oversized valves along with the stiffness of Dual coil valve springs to prematurely wear out my valve seats.. Should I go .5mm oversized due to out motors being a forced induction motor? Or should I just go the 1mm oversized? Would having 1mm oversized valves lessen the structural integrity of the head itself, due to taking more material away to fit the larger valve? Does having 1mm oversized valves on a forced induction motor kill my LOW END? or does it not matter because we are boosted motors? Will the dual coil valve springs NOT be a good idea for me being as it is not a full "race car"? What kind of max rev limit should I be looking at with the lighter internals and retainers etc? My car will be a STREET CAR, I am expecting around 900rwhp (with n20) The turbos will be pushing ~32psi on race gas. I would like to see it break the 1000rwhp mark, but that would be pretty tough. I know with that much power, nothign lasts long. The car will be driven mainly on the street with some weekend drags and some other fun stuff. Mainly on pump fuel, menthanol injection with NO n20 on the street (most of the time) I am being realistic with my goals. Please no stupid posts. I just need some thoughts on this as to what I should do for my heads.. Those that know me, know that I dont just talk this crap out of my ass.. .I make a goal.. .then build the engine/car to meet that goal that I set. I will be doing ALL of the work besides the machining of the block and lapping the valves in, and ASH will be tuning my vehicle. ps. Either way .5mm or 1mm, I will be going with the Inconel Exhaust valve option. Thanks alot for your thoughts! Shawn300zTT NO, This picture is not photoshopped. It took many times to take this picture. Setting up the timer, shutter speed etc, then jumping on my bike and getting the tire to spin. AIM:Shawn300zxTT "-Any closeups on the nuts? - zboost(tx) 19:17:53 08/08/05 -Not really something you want to ask another man about... (n/m) - LordZ 19:24:00 08/08/05" "I just took 45 min and scrubbed the heck out of my rear" teambushido(San Diego, CA) 19:24:51 12/11/04 1991 Stage _ TT 5spd (Turbo Upgrade in process) 1990 2+2 Na Stage 3 Auto 11 Sec Eagle Talon Tsi AWD, Daily Driver. 2004 Honda CBR 600RR (Candy blue)
Follow Ups	Ferrea oversized valves... Dual coil valve springs etc(Ash?) - Shawn300zTT GT28R MD 09:55:53 02/27/06 i had the 1mm put in my heads........ - madtdogs 10:19:56 02/27/06 900rwhp is not a street car...no matter how you look at it - genic 11:14:57 02/27/06 thanks for your input.. the 900rwhp would be totally on - Shawn300zTT GT28R MD 11:33:39 02/27/06 For an ideal street car- I recommend .5mm over and 400+ cams - maglito 11:33:21 02/27/06 Thanks... I have the JWT400+ cams... - Shawn300zTT GT28R MD 11:43:56 02/27/06 With all that work and HP goals, you'd be foolish to not - Scotts94z32 11:57:10 02/27/06 agreed that or a totally different solid lifter cam setup - maglito 12:07:31 02/27/06 remember that the turbine section is the SAME as the RS - Shawn300zTT GT28R MD 12:20:34 02/27/06 Greg is running the 500cams on his "900CWHP" Z and says - Scotts94z32 12:25:40 02/27/06 yes, I did... thats the two cars that I thought of first.. - Shawn300zTT GT28R MD 12:29:31 02/27/06 No problem. Good luck, and thanks! Seca rocks.. ;) (n/m) - Scotts94z32 12:45:52 02/27/06 What does the C stand for? (n/m) - BradZ (FL) 12:41:16 02/27/06 Crank HP estimated from 1/4 mile trap speed. (n/m) - Scotts94z32 12:45:20 02/27/06 Ah, thanks. I had a n00b moment. (n/m) - BradZ (FL) 12:46:24 02/27/06 it stands for Canadian horse power, gotta divide by 1.205 (n/m) - ZEngineer 13:58:07 02/27/06 lol (n/m) - 93silverTT 14:32:35 02/27/06 I am looking at a 7850 rev limit - maglito 12:14:01 02/27/06 LOL, the Manifolds are killing me as it is! :) - Shawn300zTT GT28R MD 12:22:59 02/27/06
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