Guest Anonymous Posted September 14, 2002 Share Posted September 14, 2002 Hey all I was just wondering if there are 4 valve V-8s (other than the LT5 and Northstar). I was wondering if one of these motors would be worth it or just sticking with my first idea of using a 305 with twin turbos. Quote Link to comment Share on other sites More sharing options...
Tim240z Posted September 14, 2002 Share Posted September 14, 2002 There is a crowd here in SoCal that makes a 4 valve per cylinder head. Sorry can't remember the name, but the pair of heads go for about $5,000.00 Tim Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted September 14, 2002 Share Posted September 14, 2002 http://www.araoengineering.com/ I do not advise you buy these, I was about to purchase a set but when I started asking lots of specific questions about referances and other happy customers I was quickly and totally stonewalled as to answers and further E-MAILS and phone calls were ignored, it seems that if your willing to just send them $6000 thats fine but if youll want to know how other peoples engines run with those heads youll get no info other than the one printout of a build they did for a magizine several years ago! now if you had a product that worked well don,t you think that you would be shouting to the world about all the people winning races with your parts? in 35 years Ive seen two sets and both were on show cars not racers or dailly drivers. this is the last response I got "PAUL, MY APOLOGIES, ARE IN NEED HERE . I HAD ALOT GOING ON THIS WEEK.ACTUALLY EVERY BODY DID!I HAVE MOST OF THE INFO. READY FOR YOU . I AM WAITING HOW EVER FOR OUR NEWEST IN CAR DYNO TEST RESULTS TO GET HERE.I KNOW THEY PRODUCED ABOUT 600H.P TO THE REAR WHEELS WITH AN EVERYDAY DECENT STREET MOTOR IN AN ALL STEEL 1956 CHEVY STEPSIDE TUCK .SO I DO APOLOGIZE FOR THE DELAY.I HAVE ADDED CHEVYTALK TO OUR LINKS PAGE AND I'VE TAKEN SOME TIME TO READ SOME OF THEIR FORUM CHATS AND WAS VERY HAPPY WITH SOME INFO I WAS ABLE TO FIND . I ALSO WANTED TO THANK YOU FOR YOUR INSIGHT ABOUT OUR 32valve HEADS. I WILL GET THAT MAILED OUT THIS WEEK." yet no further info ever showed up even after several E-MAILS and phone calls Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted September 15, 2002 Share Posted September 15, 2002 I don't need 4 valve heads for $5000, I wanted a Z so it would be relitivly cheap. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted September 15, 2002 Share Posted September 15, 2002 I was thinking of using a 305 for fuel milage. But I really don't know what I need/want to do. Maybe I will just update the suspension first. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted September 15, 2002 Share Posted September 15, 2002 The ford cobra motor is 32 valve isn't it? (I know its a ford and it sounds like you were talking GM) Might be a bit wide for a Z, thats been disputed a time or two around here. Lone Quote Link to comment Share on other sites More sharing options...
Pop N Wood Posted September 16, 2002 Share Posted September 16, 2002 Quite a reversal to go from 4 valves per cylinder to a twin turbo 305! Or did you mean 350? Huge difference. Quote Link to comment Share on other sites More sharing options...
Guest BigE Posted September 16, 2002 Share Posted September 16, 2002 Yeah, the 96-98 Mustang Cobras have 4 valve heads. There's a guy in Alabama with a 98 Cobra w/T-trim Vortec running 10.78@129 on the stock motor. He holds the record for World's Fastest Stock Long Block Mustang. The 4 valve setup is so efficient that he's pushing 18 psi on the stock motor and launching at ~5000rpm. He's been up-ing his launch rpm seeing if the motor will go because he has a built motor ready to go it. It just won't let go. He's broke two rear ends and a transmission trying. Not bad for a stock motor-ed Stang. Sorry for the ramble but, yeah, the Cobras are 4v and yes, they are well worth it if you use FI. E Quote Link to comment Share on other sites More sharing options...
Guest BigE Posted September 16, 2002 Share Posted September 16, 2002 Also, see this link. http://www.alternativeauto.com/waterbox/32v_lx.html Quote Link to comment Share on other sites More sharing options...
Moridin Posted March 10, 2003 Share Posted March 10, 2003 I know this is a little old, but I just wanted to update on the stock long block thing. Some guy on one of the SVT forums just posted a 10.06 at 131 (I think it was 131) with the stock block. This is an 03 Cobra with IRS and Kenne Bell supercharger with some exhaust and other mods. Still waiting for the motor to break. He's pushing close to 800RWHP on the stock block (and maybe fuel system, not sure yet). Anywho, the 5.0 Cammer motor looks like it might be nice with a little modding to the shock towers Quote Link to comment Share on other sites More sharing options...
Guest zfan Posted March 10, 2003 Share Posted March 10, 2003 I like the 03 cobra, checked one out week before last at the dyno's. Very impressive almost 430 hp at the wheels Daily driver as well! Mike Quote Link to comment Share on other sites More sharing options...
Kevin Shasteen Posted March 10, 2003 Share Posted March 10, 2003 I also like the Ford DOHC V8 engine, too bad it doesnt fit in the Z. I only wish someone made a DOHC V8 that would fit in the Z w/relative ease. I have searched the net for pictures of DOHC V8's; seems there are a lot of write up's on DOHC V8's but not too much in the way of viriety of actual pictures of DOHC V8's. Ok, who is going to be the first to stuff a Ford DOHC V8 in an early gen.Z? I'll provide the Z if someone else wants to provide "MY Z" w/the DOHC V8 Anyone seen pictures of Nissan's new Titan Full Size P/Up? It is suppose to be getting a 5.6 DOHC V8 w/respectable hp/torque numbers. The Titan is to be revealed in NY in April 2003. It appears the DOHC V8 wars have begun...still wondering when GM/Mopar will be using a DOHC V8 in their cars cross the board: they cant ignore Ford, Toyota, and Nissan forever. Kevin, (Yea,Still an Inliner) Quote Link to comment Share on other sites More sharing options...
ZROSSA Posted March 10, 2003 Share Posted March 10, 2003 Before I Cam to Hybrid Z i would have agreed with you Kevin. I have always been a fan of small engine that you could rev the hell out of. I am Not convinced that a 4 valve head is needed in engines larger then 5.0 lts. You just dont rev them Hard enough and if you do it costsa lot more $ to modify them to be able to live with it. 4 cams instead of 1 and so forth. The overhead valve engines seem to be much smaller and lighter as well. I guess what i am trying to say is that for a specific realistic power output its going to be much cheeper to get it from a pushrod engine. I noticed the other day that the Gen 4 chevy engine is still a push rod all be it a twin cam like the new harly engines. Douglas Quote Link to comment Share on other sites More sharing options...
pparaska Posted March 10, 2003 Share Posted March 10, 2003 Douglas, I agree. For streetable power levels, a 5.7+ Liter engine can make good torque and power in a reasonable rpm range with good two valve heads and pushrods. Tweak an LS6 and there's plenty of capability as well, if a "higher tech" solution is desired. If I wanted crazy HP on the street, I'd do a turboed V8, with a moderate amount of boost, tuned to have it come in at 2000 rpm or below. Driving a 500+ hp car that goes from 350lbft to 500 lbft like a switch at 3500+ (high rpm tuned turbo setup) would be dangerous. Cubes enable a lower pressure turbo system that could cover a lower street-reasonable powerband, while allowing plenty of power. Quote Link to comment Share on other sites More sharing options...
Moridin Posted March 10, 2003 Share Posted March 10, 2003 Chevy has always been able to lay the hand down to Ford with power. Then again, Chevy has always been a little bigger in displacement. As to a DOHC V8 that might fit, the Northstar should do it. Relatively small from my understanding and lightweight. The http://www.chrfab.com guys are working on a bellhousing to adapt a T56 to it. I think a small displacement V8 with a set of twin ball bearing turbos would be awesome. Keep them small and they'd be ready to go at the touch of the go pedal. Plus with a AFC and boost controllers (or just a stand alone EMS) you could tune power levels on the fly. Take it down for the street, then push it out at the track. Expensive set up, but turbos are always fun. Then again, an LS1 or built 350 always sounds fun. Quote Link to comment Share on other sites More sharing options...
Kevin Shasteen Posted March 11, 2003 Share Posted March 11, 2003 I agree about the "reasonable power/rpm range" issue. But with the rising costs of pump fuel I dont think GM & Morpar can ignore the benefits of a SOHC/DOHC V8's much longer. When speaking of "reasonable" it is a relative term. Only relative to exp's to make the engine -vs- the market's needs. It is only a matter of time before GM will be forced to go SOHC/DOHC V8 as Ford already has, clear cross the board. Surely GM is paving the way for the DOHC engines via Olds & Cadillac. Once that is old tech the other lines will be handed that tech. Surely GM & Mopar already have their DOHC V8's waiting in the shadows, clear cross the board, as most auto mfg's usually are 10 years in advance of the RPO market. Whether the choice of DOHC V8's will be the Olds/Cad engines who can say. I would venture a guess that the gas prices have not risen enough to justify the exp's of the better breathing/better fuel mileage of the DOHC's. I like the push rods V8's as I am more familiar with them...but the power potential/fuel mileage of a DOHC V8 intrigues me. Kevin, (Yea,Still an Inliner) Quote Link to comment Share on other sites More sharing options...
BLKMGK Posted March 11, 2003 Share Posted March 11, 2003 Who says the DOHC 4.6 won't fit? I've posted measurements before - it would be tight but I think it just might fit. BTW - there's an '03 Cobra around here laying down 500RWHP on the stock block. I've seen posts of 700+RWHP on a Kenne Bell blown '03 Cobra... Quote Link to comment Share on other sites More sharing options...
zgeezer Posted March 11, 2003 Share Posted March 11, 2003 The pick a parts I frequent always have several if not "many" Japanese, Chrysler, Subaru, Ford, 2.4L-3.0L turbo engines. Small turbos with H2O cooled bearings. If one stays away from high boost (say 5-8#), two of these might work w/o intercoolers on a 5.0 L Ford or Chevy. Has anyone out there attempted this on a FI car w/o going overboard. Low bux Turbos, anyone? gw Quote Link to comment Share on other sites More sharing options...
Moridin Posted March 11, 2003 Share Posted March 11, 2003 Yah, there's a guy by the name of Nitrous Pete, running close to 800RWHP on the stock block other than the Kenne Bell blower. These things may prove to be as indestructable as the Supra's. Quote Link to comment Share on other sites More sharing options...
Moridin Posted March 11, 2003 Share Posted March 11, 2003 I posted something about the new DOHC (quad cam) V6's that GM is building. Sounds like they will eventually shift that to the V8. With upwards of 370+ boosted HP, it may be replacing a few V8s here and there. Anyone for a boosted V6 Camaro? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.