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Old 02-04-2006, 05:32 AM   #1
phillazenby740t
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Question elusive b230ft double valve springs

Does anybody know of anyplace that might sell double valve springs for my b230ft, just ordered ipd turbo cam and im afraid the stock ones will float.

Thanks
Phil
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Old 02-04-2006, 05:34 AM   #2
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stock ones should be fine but i believe volvo sells double valve springs for the b230's
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Old 02-04-2006, 07:31 AM   #3
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Is your rev limiter set to the stock 6K? If so, don't bother IMO. At most get a set of stiffer single springs.
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Old 02-04-2006, 09:01 AM   #4
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For the IPD cam and stock engine management, stock springs are fine. New stock springs would also be fine if yours are high mileage (like 200,000 miles). If you are using 7000 rpm or more, you may want to look into a cam beyond the IPD cam and stiffer springs. I use stiffer single springs, rather than double springs. There is no advantage to creating any more drag on the valvetrain than is necessary.

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Old 02-04-2006, 10:14 AM   #5
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you could also buy some inner springs quite cheaply
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Old 02-04-2006, 10:24 AM   #6
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i just got some springs for my b230ft. they are out of a nissan engine. they are much stiffer than volvo stock springs, but they are the exact some diameter and size. so they fit perfectly, no changing the seats or retainers. if you give me a day or two i'll get the box from my shop and give you the exact specs so you can try to order some.
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Old 02-04-2006, 11:39 AM   #7
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Question hey

So if using a 531 with kg2t cam and planing to redline at 7k
stock valves wouldnt cut it?
were can i get stiffer springs?
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Old 02-04-2006, 11:51 AM   #8
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Quote:
Originally Posted by str8krewzn
So if using a 531 with kg2t cam and planing to redline at 7k
stock valves wouldnt cut it?
were can i get stiffer springs?
Get springs & retainers from KG Trimning when you get the cam. Single springs will pass through bad harmonic periods, the only exception being the varible rate barrel shaped springs that are gaining in popularity.
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Old 02-04-2006, 03:27 PM   #9
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Quote:
Originally Posted by Boosted242
i just got some springs for my b230ft. they are out of a nissan engine. they are much stiffer than volvo stock springs, but they are the exact some diameter and size. so they fit perfectly, no changing the seats or retainers. if you give me a day or two i'll get the box from my shop and give you the exact specs so you can try to order some.
Please do! That would be really interesting information to have floating around the board.
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Old 02-04-2006, 06:04 PM   #10
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Any kind of valve spring will weaken significantly after 50 to 100 thousand miles. At least get a new set of stockers. If you want to wind it over 6000 rpm, go stiffer.
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Old 02-04-2006, 06:13 PM   #11
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Question so

Is there anywere in the US that sell stiffer springs?
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Old 02-05-2006, 01:26 PM   #12
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For 6000 stock springs work just fine, 7000 is the limit (that is where I have my stop), if you want to go above 7000 you need harder/double springs.

But with redblocks, 6000 is enough for 300 hp, 7000 is 400+ territory.


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Old 02-05-2006, 01:47 PM   #13
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Question ko0

But im not sure how much miles the 531 has
and im getting larger vlaves in it
so im not sure if stock springs strong
enough to hold larger valves and go up to 7k
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Old 02-05-2006, 02:03 PM   #14
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I will disagree that 7000+ rpm is 400+ territory.

Peter made 400+ horsepower at 5200 RPM with a 6000 rpm redline........these are not honda motors. Great HP can be made at a useable range.
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Old 02-05-2006, 04:17 PM   #15
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I´m just saying, easy power: 375.8HP / 533NM (393lb/ft) @ 4000rpm @ 1.7bar (25psi)
And it is mostly on common parts (at least here in Volvo country).

Don´t believe me? Look here: http://www.garaget.org/?car=1562

Tell me if you need any translation.
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Old 02-06-2006, 12:27 AM   #16
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Quote:
Originally Posted by frpe82
Im just saying, easy power: 375.8HP / 533NM (393lb/ft) @ 4000rpm @ 1.7bar (25psi)
And it is mostly on common parts (at least here in Volvo country).

Dont believe me? Look here: http://www.garaget.org/?car=1562

Tell me if you need any translation.
On 7:1 none the less.... crazy. Any more info on the nissan springs yet?
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Old 02-06-2006, 01:11 AM   #17
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Comp Cams 981-16
PN: 981
Quantity: 16
# Outside diameter: 1.254 in.
# Inside diameter: .880 in.
# Seat load: 105 lbs. at 1.700 in.
# Open load: 295 lbs. at 1.250 in.
# Coil bind: 1.150 in.
# Rate: 423 lbs.

Widely available, very very welllll tested in race duty, drop in springs for a B230.

-Andy
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Old 02-06-2006, 03:21 AM   #18
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Quote:
Originally Posted by DerSnart
On 7:1 none the less.... crazy. ...
Yes, it was just a little thing on the side to show you can make power without high RPM.
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Old 02-06-2006, 09:24 AM   #19
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Quote:
Originally Posted by Stereophile33
I will disagree that 7000+ rpm is 400+ territory.
Missunderstand me correctly.

I am not talking about where max power is, rather what I meant with 7000 rpm is where the usable rev-range is. For example a more or less stock engine will have a useable range from 2500 - 5500, start tuning with a larger turbo, another cam etc, and you will most likely move the range higher. A typical 400 hp redblock will most likely have a range from 3500 - 7000.

In most cases the more power you make the higher rpm you will have to use.

Actually rpm = horsepower, but that is a different discussion.



Quote:
Originally Posted by frpe82
Im just saying, easy power: 375.8HP / 533NM (393lb/ft) @ 4000rpm @ 1.7bar (25psi)
The most interesting part of that power is that the dyno said 303 RWHP and then managed to make that 375 FlyWHP, that is why RWHP is always much more interesting to read about.

Also, the peak hp was at 6000 rpm and peak torque was at 4000.


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Old 02-06-2006, 10:25 AM   #20
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and torque is what makes the thing go, horsepower is merely a byproduct.
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Old 02-06-2006, 10:38 AM   #21
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Quote:
Originally Posted by Vee_Que
and torque is what makes the thing go, horsepower is merely a byproduct.
This is an old chestnut of the web.

But torque is meaningless without rpm. And if you combine torque with rpm, then you get HP. HP is the meaningful measurment that includes both how hard the motor is twisting and how fast it is twisting, which results in how much work it can do. Torque, by itself, is almost meaningless. An old flour mill water wheel, for example, could have huge torque figures, staggering amounts of torque, with multiple buckets of water weighing 200 lbs each pressing down on a 12 foot long arm. But it turns at 25 rpm, and thus only produces 1 or 2 hp. Torque figures can be misleading, it's nearly impossible for a HP figure to be misleading.

Torque at 4000 rpm is nice. The same amount of torque at 8000 rpm is twice as nice.
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Old 02-06-2006, 11:51 AM   #22
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This does not add anything to the discussion, but I just thought I'd make things even more lovely (and confusing for those that have not been enlightened), what makes the car accelerate is torque at the wheels...

Not engine torque and not engine horsepower.


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Old 02-06-2006, 01:25 PM   #23
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too much bs to read in this thread, but you can vuy double valve springs from Sten parner Motor in Sweden for not a whole lot

stenparnermotor.se
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Old 02-06-2006, 02:19 PM   #24
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If these springs are also sold under a Crane part number, I am pretty sure they are in my built B230FT. I bought them from Summit a couple of years ago. Reportedly, they were drop in, but the machine shop told me otherwise. As I recall, there was an issue with the Volvo retainer. The shop either made a change to adapt the retainer or ordered another aftermarket part, possibly from Scat. The shop did, however, like the spring and its specs for use in my built motor. It researched alternatives and came up with nothing better that we could get in the US on short notice.

Philip Bradley

Quote:
Originally Posted by mAydAy
Comp Cams 981-16
PN: 981
Quantity: 16
# Outside diameter: 1.254 in.
# Inside diameter: .880 in.
# Seat load: 105 lbs. at 1.700 in.
# Open load: 295 lbs. at 1.250 in.
# Coil bind: 1.150 in.
# Rate: 423 lbs.

Widely available, very very welllll tested in race duty, drop in springs for a B230.

-Andy
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Old 02-06-2006, 02:51 PM   #25
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I have not seen anyone mention what the safe speed limit is for stock springs.
If double springs are not NEEDED I would not fit them.
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