© Copyright 1995 thru 2008 - The Mustang Works™. All Rights Reserved.
MustangWorks.com is designed and hosted by Aero3 Media.
MustangWorks.com is designed and hosted by Aero3 Media.
01-26-2002, 07:08 PM | #1 |
Registered Member
Join Date: Jul 2001
Location: West Bloomfield, MI
Posts: 391
|
do i need new springs???
im going to put on crane 1.7 RR on my 90 GT. the motor runs great, no problems with valve floating at all. it has 80,000mi. on it. my question is do i need to get new valve springs?
if you think so, why? and which ones would you recomend? how much lift does the stock cam have? and what would putting the 1.7RR put it at? thanks, adam
__________________
90 GT black/ grey leather ported GT-40 heads w/ 1.7RR, Cobra intake w/ ported lower, 24# injectors, 190LPH pump, 75mm Pro-M MAF, 65mm TB, K&N panel, BBK long tubes, Off road H-pipe, 2 ch. Flowmaster, Black magic fan, Kirban FPR, 180 deg. T-stat, 3.73's, Steeda Tri-Ax, 130 amp alt. Accell 8.8 race wires/cap/rotor, motorcraft plugs, Factory Five suspension, etc etc etc.... http://avbcon12.stangnet.com Last edited by avbcon12; 01-26-2002 at 07:26 PM.. |
01-26-2002, 08:23 PM | #2 |
Mustangs
Join Date: Jul 2000
Posts: 1,938
|
My GT has 1.7 Crane Cobra roller rockers and at 120,000 miles i haven't had any valve float yet and i've had it up to 6,000rpm a couple of times (woops!). It's a good idea to replace them now since you're in there. The reason why is because with the larger pivot ratio you're pushing the springs down farther than they'd go with the stock rockers and when you start revving it any weak springs will have a hard time rebounding fast enough to keep the valve seated when it's supposed to be and you'll find out that your engine's power band seems to flatline at a certain rpm. That can be bad because if that's not at the end of the power band that's wasted power. Also, since you'll be having more spring travel, it will wear the springs out faster than they'd normally wear, especially if you flog your car often, so you may end up doing it down the road anyways. I hope this helped answer your question.
__________________
2005 Suzuki Hayabusa GSX1300-R 1980 Ford Thunderbird - 255 V8 ported heads, 5.0L ported stock headers, O.R. H-pipe and Flowmaster 2-chambers, dual roller timing chain hi-po Mack Truck hood emblem 1985 Mustang GT 5.0L T5, F-303, GT40p, headers, off-road h, flowmasters, MSD stuff, etc. Sold 02/06/04 1989 Mustang GT ET: 13.304@102.29 mph (5-24-03) Sold - 1998 Mustang Cobra coupe, 1/4 mile - street tires: 13.843@103.41 (bone stock) |
01-26-2002, 09:11 PM | #3 |
Registered Member
Join Date: Jul 2001
Location: West Bloomfield, MI
Posts: 391
|
my car is mostly summer street driven, it never sees a strip. and wont.
i just bought it las summer from a friend of mine and he took care of it. no ragging on it. my problem is trying to figure out if 80,000 well driven miles is too much to last a while with the 1.7RR's. if anyone else thinks i should put new springs on, what kind and where can i get them. and dont suggest anything a college student cant afford...haha thanks a lot, adam
__________________
90 GT black/ grey leather ported GT-40 heads w/ 1.7RR, Cobra intake w/ ported lower, 24# injectors, 190LPH pump, 75mm Pro-M MAF, 65mm TB, K&N panel, BBK long tubes, Off road H-pipe, 2 ch. Flowmaster, Black magic fan, Kirban FPR, 180 deg. T-stat, 3.73's, Steeda Tri-Ax, 130 amp alt. Accell 8.8 race wires/cap/rotor, motorcraft plugs, Factory Five suspension, etc etc etc.... http://avbcon12.stangnet.com |
01-26-2002, 11:50 PM | #4 |
Junior Member
Join Date: Mar 1999
Location: Ventura, California
Posts: 8,981
|
I'm not going to go shopping for you, but I do think you should replace the springs. Try Summit, Jegs, or Hawaii Racing.
Take care, -Chris
__________________
Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local
RED & WHITE! |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
stocks springs vs. lowering springs | GhettoPop | Windsor Power | 1 | 02-12-2004 07:08 PM |
can I use hardtop springs in my vert? | tireburner163 | Windsor Power | 5 | 02-25-2003 02:46 PM |
H&R springs or Eibach?? (replaing my Jamex Springs) | KB94GT | Modular Madness | 0 | 05-14-2002 07:44 PM |
valve springs....questions | Old Guy with 87 GT | Windsor Power | 5 | 05-03-2002 06:36 AM |
Springs | MDM | Windsor Power | 0 | 04-11-2001 06:53 PM |