So, totally random, and only applicable to a couple of members on here.
But I was talking to Turbosmart regarding a product, and in talking came to the topic of springs for supercharger bypass valves/bovs. I have a a 0-4 inHg spring in my turbosmart raceport, which basically means it starts to shut at 4inHg and is fully shut at 0. Reason I had this is that I wanted the bypass open unless I was boosting obviously, being a supercharger and all.
Anway, they told me they thought it was the wrong spring based on my vacuum. I am pulling 16ish inHg vacuum at idle. They told me to try the 10inHg spring which I already had as part of the kit I bought. That spring is rated 10-7inHg. Reason being, you base your bypass spring rate via your engine vacuum. It will give you better throttle response they said.
So anyway, I put the 10inHg spring in, and wow! It has changed the car completely. Anything above 50% throttle is just instantly into boost. Before I had a bit of a lag time before it hit. Now it just starts as soon as my foot is down. The bypass is still open at idle, and is still open up to about 50 % throttle, which is perfect. Feels so much quicker, and the wheels chirp now.
Anyway, like I said, only applicable to a couple of guys on here(who probably already know this and are thinking "what a tit!"), but hey, you learn something every day. They said to only use the 4inHg spring if you motor was making 8inHg vacuum or lower.
Last edited by Husky65 on Thu May 24, 2018 11:16 pm; edited 3 times in total
All the headers we have wrapped (race cars) chrystalized and fell apart. I will only ceramic coat them now.
Yeah I've wrapped a couple before on some turbo cars. They held up ok, but that was only street driving. I know any moisture retained in there may eat away at the metal if it's left sitting, so we will see how we go. I find wrapping better at retaining heat than ceramic coating.
In saying that, if these were big dollar headers, no way I would wrap them. Ceramic for sure. But I paid an awesome price for these hookers, so I'm not really fussed. See how we go hey...I can be the test dummy
My wife said it was too small.......so I got a bigger bypass valve.
Bought the turbosmart big bubba, again, got it cheap. Replaced the smaller one tonight and just let it idle in the garage. Wow, this thing is letting out heaps more air than the raceport. Honestly it like my two au fans are on high speed under there. This novi2000 moves an incredible amount of air at idle.
Last edited by Husky65 on Tue May 29, 2018 8:16 pm; edited 1 time in total
Well, tore down the motor yesterday as I wanted to test fit the headers to 1. See if they fit and 2. find out where to put the o2 sensor bungs.
And I can happily say that they fit! Tube 2 is just touching the shock tower( i think it's the wrap), so I might dent it a little on the press and I still have the headgasket to go on.. I had to re-clock my starter motor which will mean a couple new cables, but apart from that all good.
Cleared the unisteer rack by miles, although I did have to remove the steering shaft/coupling to get the header in place.
Ignore the hammer, I used it to wedge the headers in place to save my putting the rear bolts in.
Last edited by Husky65 on Thu May 31, 2018 5:55 pm; edited 1 time in total
The logos and trademarks used on this site are the property of their respective owners.
We are not responsible for comments, advice, opinions, products or services posted by our members, as they are the property of the poster.