I heard some talk of this becuase the redline is raisedto7800 , i really woudnt think it would be nesessacry its only an extra 600rpm. But i though i heard someoen say if you didnt your top end cant handle it. Any help would be very great ful


oh yea and i did search and i came back with a million results so if anyone wonders. i looked threw alot but no answer to my question.

1997 Dodge Avenger I-4 5-Speed
DreamSpeed Cold Air Intake,AF/X Under Drive Pully, ES Motor Mount Inserts, MSD DIS2, MSD Coil Pack, MSD 8.5mm Wires,Aluminem Flywheel,Spec Stage1 Clutch,Crank Scraper, Quaife LSD,Airmass 4-1 Headers, Test Pipe, Bosal Catback,B&M Short SHifter(50%),Symbroski Shifter Kit, Grounding Kit, Solid Front Motor Mount

ecu raises ur rev limiter to i think 8200, i myself have never gone over 7k. some things u might want to change if u do plan on making some frequent trips over 7k are upgrades lifters, rockers, and valve springs.

03 rally red evo viii - stock
cardomain page
http://www.cardomain.com/id/steve0677

I had cams tha made power past 7200 and after MANY repeated trips to 7200 rpms I only broke 2 stock rockers. The stock Valvesprings tend to float past 7200 so if you are going to rev it to 8200 (DO IT) then upgrade the valvesprings so the valves don't get to meet the pistons.


The reason people say to do the whole top end is because if you are going to pay the labor to do one thing, you may as well do it all cause it will cost you less.

Get good cams, cam gears, PT or Blackdog rockers and lifters, Crane valve springs and titanium retainers and do the timing belt service. If you want to since it's all apart, get a 3 or 5 angle valve job, get the head ported a little bit and put in 1 mm oversized valves.



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I talked to armond and he said that just upgrading lifters and rockers should be good for 7800 rpm for short periods of time. But now you're saying valve springs too and i'm all confused.

16.1 @ 87.11
http://www.virtuallyinfamous.com

ARD 57mm tb and p&p manifold, Neuspeed STB, Pro-kits, Illuminas, Injen CAI with K&N, 2.5" pacesetter catback,
AF/X UDP, Rear STB, Powerslot rotors, RRE SS Brakelines.

The valvesprings are designed to control to 7200 rpm so past that and they can't shut the valves fast enough. Crane has some available for us and CNNP used to have double valvesprings that we could use.






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yes you must replace the valvesprings, OEM sucks

1998 dodge avenger 4 cyl AT
Mods are:
Not enough

Crane also makes a good set of valve springs for us that use the stock install height. I have em on my car and I have 0 complaints.

Matt
1995 Eclipse GS
2.0L, S16g Turbo, 8 Injectors, 26psi

1998 Eclipse GSX
2.3L Stroker, AEM EMS Converted to Speed Density, FP3065 Turbo, 35psi , and so on...

Do any of you guys have practical experience with running the engine to 7800 or is this just hearsay?

05 Mazda RX-8
06 Lotus Elise

>Do any of you guys have practical experience with running the
>engine to 7800 or is this just hearsay?



Ever read the neon boards? Remember they have had the AFX ECU with an 8200 redline for a few years.




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So in this specific case just hearsay then.

05 Mazda RX-8
06 Lotus Elise

Heresay from the neons as well as seen the pics of the broken valvesprings. I was looking for some of the older posts that I had seen over there but can't find it right now.



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Nor can I. I searched neons.org. I only see the same type of passed info where people state they you need valve springs. The problem is I recall before they were ever available that people seemed to rev to 7800rpm just fine in their neons and never considered them a problem. It seems a few people have broken theirs,but not because of rev related issues, and all of a sudden everyone needs new valvesprings for every reason imaginable. This is what I call hearsay.

I will let you know if I ever break mine personally as I only upgraded the rockers/lash adjusters to the PT stuff. Everything else in my head is still stock mopar parts. I have the AFX ecu with the 7800rpm redline. If I break something, then I am proven wrong. I am not an expert by any means on what they can handle, but I suspect I will be fine with my aggressive street driving that my car will maintain. Upgrading valve springs is not a bad thing, but I am not convinced yet it is a necessary thing. If I were racing it heavily then I would consider different.

05 Mazda RX-8
06 Lotus Elise

I think the valve springs themselfs are a pretty strong piece capable of handling the 8200rpm fine, but like any stock piece not if you always rev to 8200 rpm. But at that point you'll be breaking other stuff too probably.

The reasons I see to upgrade, titanium retainers would be nice for lowered valvetrain mass. The other reason being if you are running obscene cams then the stockers won't compress enough to get the lift of the cams.

Beyond that they would be nice, but I haven't seen any proof on stock or mild cams that it is necessary. Because I don't ever remember hearing about valve springs breaking due to increased revs, just rockers and lifters.



15.9 @ 86.7mph
97 Eclipse RS

Injen CAI, 55mm TB, P&P Intake, Crower Stage 2 Cams, Hooker Header, GS-T Muffler, AFX UDP, Crane Ign Amp, S-AFC

Sorry if this is an old question, but how is the ecu with the 8200 redline and is it only made for the 97 or can i put it on my 99 rs. Also, would it benefit me if i have a turbo setup and buy this ecu.

99 RS-T
"New bottom end(8.6:1 w/long rods)"
Turbonetics 60-1/Portfueler/etc!!!!!