racerx260

Nigel Let Us Know What Your Oil Temp Runs At After You Install The Guage.i've Been In A N/a Stroker With Mobil One Oil On Lapping Day In Atlanta At The Speedway Reading 325; Thats Hot!! He Had High End After Market Guages.

I Put The Redline Water Weter In And It Made An Improvement. It Hold S The Temp At 180 Like A Rock In Normal Driving And Climbs To 200 Instead Of 220 On Long Upgrades And Extended Runs On Full Boost.this Will Have To Do For Now.

I Found A Post With All The Cam Profiles And The N/a Is More Aggressive Than The Turbos. I Also Have Put A P90 Head On A N/a Motor With The Stock 81 Cam . It Was A Little Worn So Later I Changed To A Good N/a Cam And Immediately Noticed A Differance, And No The First Cam Wasn't That Bad , Just A Few Groves.i'll Probably Put A N/a Cam In My P90a Head On My 83 Turbo Motor I Just Installed In My 260.until My Ship Comes In Or I Win The Lottery.

Thanks For The Info Guys!i'll Try And Verify My Guage,and Go With Some Water Wetter And An Increase In The Water Ratio.next Save Up For An Upgrade On The Radiator.i'll Switch To Moble One Oil Soon. I'm Currently Running 20w50 Pensoil With Some Sea Foam To Clean Things Up Some In This Motor.

Your Biggist Limit Is On Lift,and Longer Duration Is More For Carburated Cars.if You Can Put A Bigger Cam On A N/a Motor With Out Replaceing The Springs Then You Can Probably Use It On A P90a.this Would Limit Your Choices To A First Level Cam From Motorsports Or Something Simular.the Cams On 81 And 82 Turbos Are Bigger Than An 83. N/a Cams Are Bigger Still.the Biggest Stock Cam Was On The 260 But Is Externally Oiled And Would Need A Spray Bar.

I Have A 83 Turbo Motor And Comp. In An 74 260.running Good But After Climbing Long Upgrades[lots Of Those In N.c. Mountains]my Temp Will Climb To ~210-220;its Guess Work W/ Stock Guages.i Have New Water Pump , Good 3 Core Radiator, 50/50 Antifreeze. It Doesn;t Overheat But Sure Is Stressfull To Look At. I Also Have A Electric Fan Set At 185 .it Stays At 185 When Driving Nice And May Climb Up To 195 -200 When On Boost Alot.has Anyone Tried That Waterweter Or Any Other Antifreeze Additives To Improve Cooling?also Open To Other Ideas.wow Me With Your Wisdom.

I Have Several Of Both, Can't Tell The Difference.i Have The One From My 260 Block On My 83 Turbo Now.use The One With The Best Mateing Surfaces For A Good Seal.

Thanks For The Heads Up On The Gm Connecters, Those Are A Lot Easier To Get Here In Nascar Country.i Was Thinking It Might Be A Dip Between The Tourqe Curve Ending And The Hp Curve Climbing But Haven't Seen A Graph.your Mentioning It Is Reassuring.is There A Best Themp To Check Compression? Mine Seems To Vary Alot Depending On The Temp. Extreemly Hot After Running Hard Its Significantly Lower Than After It Has Cooled Down Some.my Motor Was An Unknown Except For Mileage ; 103,000 Mi On Speedo.there Was Still Hone Marks In The Bore When I Peeked In But From The Condition Of The Turbo When It Was Rebuilt It Ingested Alot Of Dirt.hope I Don't Have To Pull This Back Out And Re-ring Or Bore It.that Would Be A Bummer. I'll Do The Oil In Cylinder Compression Check To See If It Is Rings Or Valves.

Thanks For The Info. I Have Used The Contact Cleaner But Not The Dielectric Greese,i'll Do That Next.however; The Comment About The 5200 Rpm Hp Point I've Heard And Read Also But Mine Seems To Take Off At 5000 Rpm And Build All The Way To 6500 Rpm When I Shift .does Any One Have Any Recomendations For Replacement Pigtails For The Injectors. Mine Are In Bad Shape And Do Vibrate Loose At Times.i Have Ziptied The Wires To The Fuel Rail To Keep Them Pressed Onto The Injector Put This Is Just Stopgap Untill I Find A Better Solution. I Know That With Everything Stock I'm Not Really Building Power To 6500 It Just Seems That Way Because Of How Flat The Power Is From 4000 To 5000 Rpm..the Plugs Are Burning Clean. The Motor I Used Had 103,000 On The Speedo.i Have Some Concern With The Valve Seals Thay Are Probably Original And Hard. I Burn A Little Oil But No Smoke At Startup The Usual Clue Of Bad Valve Seals.part Of My Original Post Was; Is The Flat Spot From 4000 To 5000 Normal Or Should The Power Be Totally Liniar?, Building As Rpm Goes Up Or Are Their Fluxuations Like My Flat Spot?i Haven't Seen Any Stock Hp Graphs . Does Anybody Have One? Thanks In Advance For Any Advice.

This is my first post so cut me some slack.I just put in an 83 turbo w/ computer into my 260z,thanks for all the helpful info. Its totally stock and am fine tuneing it before I try any mods.I have never driven another turbo so I have questions about what the power should be like to tell if it is normal or not.So here it goes. The boost starts to build about 2300 rpm . I have 7 lbs of boost at 2700rpm.It accelerates strong but seems to flatten out between 4000-5000 rpm and then accelerates strongly up to redline.Is this flat spot between 4000 and 5000 normal? I have replaced the o2 sensor, have a 2 1/2 exhaust into a magniflow,and have checked all sensor connections.I have run sea foam in the oil and gas to clean up the injectors , valves and a ticking lifter, yes its a p90a head.A second concern is when in 5th at about 3000rm on the highway and I floor it the boost jumps to 7 lbs but the car just sits there and acts too rich.If i roll it on it does ok.Its like a two stoke dirt bike below the power band.IF this is normal great I'll move on, if not I'm open to suggestions.thanks, now woow me with your wisdom.