Dodge SRT Viper Forums : ViperAlley banner
81 - 100 of 117 Posts

·
Registered
Joined
·
651 Posts
Beautiful. I love seeing 1st Gen's being worked on like this. The first Viper I ever saw was a red 1st Gen. It was on the highway and the exhaust scared me.
 

·
Registered
Joined
·
960 Posts
Discussion Starter · #82 ·
Wow, guess it has been a while since I've updated... Lets add a few more pics, I'll see if I can do it in chronological order...

So, I got rid of the T3/T4's and went with two 70mm turbos.



Here is a pic with a "mock up" turbo, old turbo, and 60mm gate.



My 4" "muffler" lol, if you wanna call it that.



Pulled my heads to get rid of the paper gaskets. (They were still fine, but better get the MLS ones in there anyway.



Stock heat shield back on and pipes wrapped. You can see I had to move my filters to under the car now.



Monster exhaust wheel. (I like to think of it as traction control, or "boost by gear" lol)



Exhaust done



Tapped the block under the intake for a knock sensor. (for MSD Knock Alert)



That about wraps up the winter of 2010/2011... More to come
 

·
Registered
Joined
·
960 Posts
Discussion Starter · #83 ·
So, last summer I spent fighting some issues where the car wouldn't pull past 4800 rpm. I blamed it on my smaller turbos, but it still exists with the larger units and massive wastegates. I hit the dyno late last fall anyway just to see, and only managed 700whp by 4800rpm where it would start going way lean no matter how much fuel I put to it. (still stock motor, stock valvetrain, etc)

So, I finally figured out it was weak valve springs causing my valves to float under high load and lots-o-boost. Valve float sends raw gas and lots of air into the exhaust which shows lean on my WB and why I couldn't richen it up any. (Tip - o2 and WB sensors only read air content, not fuel, so if there is unburnt fuel in the exhaust, it doesn't see it)

Anyway, so Valvetrain time.. Roes dual valve springs and locks.



My home made valve spring compressor. To do this, you need to pressurize the cylinder so the valves don't fall down. You can see the line from my compression tester hooked to my compressor to keep the cylinder full of air.



New Harland Sharp rockers and hardened pushrods.



Also painted my intake and valve covers to something more appropriate.



Added fittings to my intake and redesigned my fuel system slightly.



Added a BAP



New Acer tablet running win7 to tune with



So that about wraps it up for winter 2011/2012.....
 

·
Registered
Joined
·
960 Posts
Discussion Starter · #86 ·
The car runs strong now, strong enough to shred gears doing a 3rd gear pull on the highway even though AFR's were 10:1 at the time...



That is about it I guess, going to hit the dyno before fall to see what kind of power I can extract from the new setup. 800whp should be a joke on 91 with 800cc's of water/meth. I kind of want to push my luck for 1k whp, but I don't want to trailer the car home from the dyno.. :)

And here is a little media for this thread. Kinda goofin around on my first run at the AutoX..

http://www.youtube.com/watch?feature=player_embedded&v=UPjZyGCks6A
 

·
Premium Member
Joined
·
9,967 Posts
Nice work Andy, and to think the first pages of this thread were filled with the VA collective trying to convince you to go larger with the turbos and it's finally happened. ;)
 

·
Registered
Joined
·
1,260 Posts
Awesome work! I asked for more videos of your car a looong time ago. Now you REALLY have to post some up when you get a chance! Congrats on all the hard work put into this car.
 

·
Registered
Joined
·
960 Posts
Discussion Starter · #91 ·
Couple goodies for Christmas, twin walbro 400lph pumps and a shifter. Going to revamp my fuel system this winter, although I wasn't maxing out my old setup.

 

·
Registered
Joined
·
1,112 Posts
1000 whp is easy ... especially with your valve train upgrades!!! just run e85... i made over 1k whp on completely stock engine.. with twin 78's... on 15 psi.
 

·
Registered
Joined
·
1,112 Posts
not saying im cool.. just saying i dont care if my engine popps.. which it will hahah eventually!! ;)
 

·
Registered
Joined
·
60 Posts
how is the spool on the 70mm setup? Also, I noticed earlier in this thread that you mentioned using hx35/40 turbo's. Do you think the hx35 turbine housing would be sufficient? or would the 40 be necessary?
 

·
Registered
Joined
·
960 Posts
Discussion Starter · #99 ·
1000 whp is easy ... especially with your valve train upgrades!!! just run e85... i made over 1k whp on completely stock engine.. with twin 78's... on 15 psi.
I think I've been close at 18psi, but need to get a clean dyno run. I think 20 should do it with my W/M.
 

·
Registered
Joined
·
960 Posts
Discussion Starter · #100 ·
how is the spool on the 70mm setup? Also, I noticed earlier in this thread that you mentioned using hx35/40 turbo's. Do you think the hx35 turbine housing would be sufficient? or would the 40 be necessary?
It's a bit laggy, but that isn't the compressor sides fault, it is the large exhaust side. Makes it very easy to drive on the street. My smaller turbos were fun, but there was no traction to be had.. lol

Either of the HX turbos would work, but PFR probably has more data on them than I.
 
81 - 100 of 117 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top