Midwest motorsports valve springs, anyone know if they are any good?
10-25-2007, 01:16 PM
#1
Member
Thread Starter
iTrader: (1)
Join Date: Sep 2007
Location: Alberta, Canada
Posts: 179
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1990 GTA
Engine: 350 LT1
Transmission: 700r4
Axle/Gears: 3.70
Midwest motorsports valve springs, anyone know if they are any good?
Hi, I just found a set of valve springs on ebay. link: http://cgi.ebay.ca/550-Lift-Valve-Sp...QQcmdZViewItem
Some of the specs are:
Seat pressure 110 lbs @ 1.750"
Open pressure 325lbs @ 1.200"
Coil Bind 1.150"
Max lift .550"
They are stock 1.250" diameter.
The price for these is only $42.00 for a set of 16.
Has anyone had any experience with these. Or do you think they would work ok with a cc305 cam?
The cam has a max lift of .510 with 1.5 rockers or .544 with 1.6. I haven't decided if I am going with 1.5's or 1.6's. I'm not even sure if i can get .544 lift with the factory 1990 l98 heads. The heads will have some work done to them including screw in studs.
Thanks,
Jamie.
Some of the specs are:
Seat pressure 110 lbs @ 1.750"
Open pressure 325lbs @ 1.200"
Coil Bind 1.150"
Max lift .550"
They are stock 1.250" diameter.
The price for these is only $42.00 for a set of 16.
Has anyone had any experience with these. Or do you think they would work ok with a cc305 cam?
The cam has a max lift of .510 with 1.5 rockers or .544 with 1.6. I haven't decided if I am going with 1.5's or 1.6's. I'm not even sure if i can get .544 lift with the factory 1990 l98 heads. The heads will have some work done to them including screw in studs.
Thanks,
Jamie.
10-25-2007, 02:18 PM
#2
Supreme Member
iTrader: (1)
Join Date: Sep 2005
Posts: 26,124
Received 1,688 Likes
on
1,283 Posts
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Midwest motorsports valve springs, anyone know if they are any good?
That's a Pioneer part #.
Basically stock replacement.
They are not enough spring for an aggressive aftermarket cam like that.
Yes you can easily get .550 lift on a set of stock heads, with the right work done to them.
Since you have to get head work done ANYWAY, just have the spring pockets cut out so you can use the right springs for the cam (986 or 987 - both are about 1.45" OD). Valve springs are the WRONG place to try to cheeep out.
Basically stock replacement.
They are not enough spring for an aggressive aftermarket cam like that.
Yes you can easily get .550 lift on a set of stock heads, with the right work done to them.
Since you have to get head work done ANYWAY, just have the spring pockets cut out so you can use the right springs for the cam (986 or 987 - both are about 1.45" OD). Valve springs are the WRONG place to try to cheeep out.
10-25-2007, 02:30 PM
#3
Member
Thread Starter
iTrader: (1)
Join Date: Sep 2007
Location: Alberta, Canada
Posts: 179
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1990 GTA
Engine: 350 LT1
Transmission: 700r4
Axle/Gears: 3.70
Re: Midwest motorsports valve springs, anyone know if they are any good?
Ok, thanks for the info.
I was also told that the tpis springs pn 700-132 were also a good drop in spring. If I only used 1.5 rollers.
I was also told that the tpis springs pn 700-132 were also a good drop in spring. If I only used 1.5 rollers.
Thread
Thread Starter
Forum
Replies
Last Post
1988iroc350tpi
Tech / General Engine
8
08-14-2015 07:52 PM
