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90 crx si/96 accord
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Discussion Starter #1
I'm realizing with the age of this motor, support is kind of dwindling....in my searching so far all I've been able to find is supertech or blox. And honestly, THE ONLY reason I said blox is so hopefully no one brings it up lol.

Just got the call today from the machinist about my cyl head, and as I suspected it does need exhaust guides.

He had mentioned it would be wise to upgrade my springs for the cams I'll be running (colt tri flow).

So, in my searching those look like the only 2 readily available options. Hopefully some of you guys can chime in with some recommendations.
 

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ED6&7. EE4&5, MB1
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Bisimoto:
ZC Pro spring and retainer kit

Rocket Motorsports:
ZC Single

Cat Cams:
S90015 = valve spring (PAC Racing Springs)
99412 = retainer

Crespo Cams:
SP-S-HDZC = springs (Sweden Oteva Steel)

dbilas:
67.100.001
67.100.002

Some more rare springs are from P.S.I. (power service imazu) and Mugen of course.
 

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DIY Guru
96 Ranger-stock
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637 Posts
From looking at the specs from ST
SPR-TS1015-ZC

77lbs @34.50mm (1.358")

It looks like you can sneak H22 springs or B18A/B18B valve springs In there.

The BC springs are
70lbs @ 1.400

But compressing them by .040 should put you in the 80lb range.

Now the retainers.. I can not say, Id have to look and measure to see if the stock retainers would have to work.
 

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ED6&7. EE4&5, MB1
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DOHC ZC not SOHC.

as in two cams
Strange comment from your side indeed, did you even bother to open any of the links I provided?

All valve springs mentioned in my previous post were for Double OverHead Camshaft version of ZC engine.
I don't question your knowledge on the matter but I have personally used two of the ones I posted on my engines along the SuperTech ones mentioned on the original post.

Just for clarifications sake DOHC models of ZC are the following:
ZC1, ZC, D16A1, D16A3, D16A8, D16A9, D16Z5
 

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Never finishes (TWSS)
91 Civic SI hb
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1,880 Posts
He noticed the word "single" and assumed sohc but it ment single spring.as in Not a duel spring app.
 

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Strange comment from your side indeed, did you even bother to open any of the links I provided?

All valve springs mentioned in my previous post were for Double OverHead Camshaft version of ZC engine.
I don't question your knowledge on the matter but I have personally used two of the ones I posted on my engines along the SuperTech ones mentioned on the original post.

Just for clarifications sake DOHC models of ZC are the following:
ZC1, ZC, D16A1, D16A3, D16A8, D16A9, D16Z5
I did not click them. I assumed they were all sohc because I was not aware bitchy moto supported dohc zc's.

My apologies
 

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Premium Member
90 crx si/96 accord
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788 Posts
Discussion Starter #9 (Edited)
Thanx for the input guys, repped who I could....need to spread rep before I can get some of you other guys .

The Crespo option looked good, saw that they were only rated for like 7500 rpms....which...could work...it is a ball and socket design....sounds like 8/8.5k rpm is about max. (Stated from a trusted forum member)

I did notice in the Crespo description it mentioned a max lift of like 12.5mm, so I will need to find the specs on the tri flow cam. Still undecided I guess, but once I find the specs for the cam lift that should help out.

And I was reading the 4g63 thread as that was being discussed, very cool and innovative work to say the least, just not sure if that's am option I wish to pursue right now.
 

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ED6&7. EE4&5, MB1
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Also something to think and ponder: Cat Cams lists the same valve springs (PAC*S90015) for few other engines.

Peugeot:
106 S16 206 S16
TU5JP engine
JP4 engine

CITROÊN:
Saxo VTS C2 VTS
TU5J4 engine

MAZDA MX-5:
B6 engine
 

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the artist formerly known as drexelstudent11
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Thanx for the input guys, repped who I could....need to spread rep before I can get some of you other guys .

The Crespo option looked good, saw that they were only rated for like 7500 rpms....which...could work...it is a ball and socket design....sounds like 8/8.5k rpm is about max. (Stated from a trusted forum member)

I did notice in the Crespo description it mentioned a max lift of like 12.5mm, so I will need to find the specs on the tri flow cam. Still undecided I guess, but once I find the specs for the cam lift that should help out.

And I was reading the 4g63 thread as that was being discussed, very cool and innovative work to say the least, just not sure if that's am option I wish to pursue right now.
You're ballsy if youre gonna run a ball and socket lifter train past 8000rpms
 

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Premium Member
90 crx si/96 accord
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788 Posts
Discussion Starter #12
Ya, it sounds sketchy...and I more than likely will never, intentionally Rev it that high. Realistically 7.5k

Side note...got a reply from colt cams, and as it turns out, the cams I purchased second hand, are in fact NOT the tri flows, been a very irritating morning...
 

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Ya, it sounds sketchy...and I more than likely will never, intentionally Rev it that high. Realistically 7.5k

Side note...got a reply from colt cams, and as it turns out, the cams I purchased second hand, are in fact NOT the tri flows, been a very irritating morning...

8k is no problem. I run that with stock cams and stock springs. Acid beaver likes to recommend 8500 as the limit for the DOHC ZC.

I think any of the springs mentioned would work fine. I have a set of rocket's ready to go in when the time comes. They are single spring, and made to rev to 10,000(not that I would). They were really cheap too, when he had a black friday sale last year(something like 70-80 shipped)

The Colt cams you bought off me are the race cams, not the tri-flows... I looked at the for sale add and it looks like I edited all the content in it once everything sold(in feb) so I cannot confirm how I had it posted, but I'm certain I did not advertise as the tri-flow(only mention this, as I don't want to think I sold you something they weren't, not to start a fight about the parts.)

I'm sorry you thought they were the tri-flows but I'm certain you will like the way they perform!!!!
 

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Premium Member
90 crx si/96 accord
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788 Posts
Discussion Starter #14
It's all good man, I mean , how long ago was that lol, I don't remember y I thought they were the tri flows, but I'm still very eager to see how well they perform!

I spent a couple hours yesterday searching trying to decide which springs to.go with, ...FINALLY found a thread on thezcr where members had crespo spring failures. So, rocket springs it is!
 

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It's all good man, I mean , how long ago was that lol, I don't remember y I thought they were the tri flows, but I'm still very eager to see how well they perform!

I spent a couple hours yesterday searching trying to decide which springs to.go with, ...FINALLY found a thread on thezcr where members had crespo spring failures. So, rocket springs it is!

Sweet! Looking forward to seeing the results!!!!!
 

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Hi, I am from Spain and I feel I have to say something about this matter:
Don't buy Supertech double springs (well, they are not anymore double springs, and since about 2 years ago they come in packs of single valve springs too). They are not made specifically for the ZC DOCH. I can assure this.

I bought a set of these 2 years ago, and when I received these were a total failure.
1) I checked heights, and there were variations of nearly 1mm within all of them!
2) They were not straight (I checked them with a precision square). Out of safety range.
3) And lastly, the length of these were not intended for a ZC DOHC! These came with super thick valve spring seats, to increase the pressure...

They seemed more like B18A springs than anything else... I returned them.

So, I contacted with Rocket Motorsports, and asked them to make a specifical springs for the ZC. I worked along with them during some weeks, helping with sizes, valve spring pressures, etc. And after some months of waiting, they released the new single valve springs. With a conservative valve spring pressure, but enough to hold any high lift and duration camshaft till the real "safety" revolution range of any ZC DOHC: which is about 8500rpm to be safe, despite the high performance camshaft can make more power above this range. Anyway, these new springs can hold higher rpm range without trouble.

I hope this helps.
 

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()*#$(*$
93 Legend L Coupe.
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I will also recommend the new Rocket springs. They are perfect, IMO, as some research I've done shows that the stock springs in good shape should actually be fine for pretty much any cam you'd run up to reasonable RPMs.
 

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ED6&7. EE4&5, MB1
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Let's do some boring knowledge sharing again.

Mugen ZC valve springs:

14761-XB2-00RA (Intake)
Free lenght: 48 mm ±0.2 mm
Weight: 40 g
Gap between coils:
- 31 mm = 1,50 mm
- 28 mm = 0,05 mm



14762-XB2-00RA (Exhaust)
Free lenght: 46 mm ±0.2 mm
Weight: 43 g
Gap between coils:
- 33 mm = 1,50 mm
- 28 mm = 0,05 mm

 

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Premium Member
90 crx si/96 accord
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Discussion Starter #19
Must spread rep.....good info lex!

Matt!!!!! I've texted you a couple times now with no reply...you giving out fake numbers again? Hahaha
 

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ED6&7. EE4&5, MB1
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Let's see if I can get the Supertech dual springs and Bisimoto springs measured at some point.

[HINT]Someone else could measure the Rocket Motorsport springs.[/HINT]
 
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