 |
www.v8forum.co.uk
The well known V8 Owners Forum, every one is welcome
|
|
| View previous topic :: View next topic |
| Author |
Message |
dbv8
Helpful or Confused
Joined: 21 Jul 2008
Posts: 83
Location: Barrow-in-Furness
1998 TVR Chimaera
|
 Posted: Sun Jul 18, 2010 2:40 pm Post subject: |
 |
|
| mgbv8 wrote: | | gelmonkey wrote: | Perry
I have done this to my engine.
You have the time to do this before the show you know 
You know you want too.
Paul |
What was the net result Paul??
The engine certainly does run out of puff. 0-100 in 7 seconds and then another 3.6 seconds to gain 27mph when it was on song last year??
I would love to do this before the show, but I've had so much down time with engine breakage due to nitrous rtelated issues that I dont want to bog myself down again. I always moan at folk for doing more than one change to an engine and then not knowing why its not working. But I went and did it myself at the start of this year due to crap advice from an "expert"!! And most of my season has gone now. I've got Retro + USC and 1 RWYB in Sept.
At this moment I have just one thing to re tune, and thats the carb fuelling. Then I can adjust the nitrous fuelling back down to 250hp and see if I get a good pass. I also only have 3 bottles of nitrous for this weekend so its gonna be tight. If I can use 2 bottles for dialing in on Saturday I'll only have 3 passes in an 11lb bottle unless I start winding the pressure up to the 950-1000psi mark when its half empty. If I use about 2lbs per run the bottle is half empty after run 3. This is when the bottle pressure drops off hard during a run so it goes rich halfway down the track  |
Perry, why not run twin bottles in the car.
Im sure pressure drop would be much less over the run.
I ran a twin 11lb set up last year and even played with a 3rd bottle for a 2 stage set up. My ignition couldnt take all that gas tho. Hopefully my new low compression forged piston engine build and megasuirt will be ready for some proper nitrous abuse. 
_________________
11.634 @ 122.6
New vid with speedo under by 5%
http://www.youtube.com/watch?v=4fxKnD0qpW8 |
|
| Back to top |
|
 |
mgbv8
Gold Member
Joined: 18 Nov 2006
Posts: 2483
1975 MG MGB GT V8
|
| Posted: Mon Jul 19, 2010 8:12 pm Post subject: |
|
|
Twin bottles is the next mod mate!!
I'm just getting bits together and thinking about the pipework. Should I go separates or two -4 into -8 and then Y piece back down to two -4's to the solenoids?? This may create the old phase change thing and spark a big debate elswhere 
I suppose two complete separate lines would give me a chance to see if I was using more on one side. Maybe I could go separates with a small balance pipe between two -4's to keep pressure even between the bottles??
Lots of variables eh 
_________________
Perry Stephenson
MGB GT + Rover V8
10.66 @ 126.51 mph
9.99 here I come !!! |
|
| Back to top |
|
|
topcatproduction
Gold Member
Joined: 09 Aug 2008
Posts: 2421
Location: Essex
|
| Posted: Mon Jul 19, 2010 9:09 pm Post subject: |
|
|
I'd try a single bigger pipe for keeping the pressure higher Pel, that way the gas doesn't have to flow so quick down the skinny lines. A -6 probably has more than double the cross sectional area of 2x -4 pipes so -6 should be plenty.
Completely seperate note, how does a spider plate compare to 8 seperate fogger nozzles?
_________________
TC |
|
| Back to top |
|
|
mgbv8
Gold Member
Joined: 18 Nov 2006
Posts: 2483
1975 MG MGB GT V8
|
| Posted: Mon Jul 19, 2010 9:50 pm Post subject: |
|
|
I would say that I think for small engines like ours, the fogger system will be easier to control as it hits softer.
_________________
Perry Stephenson
MGB GT + Rover V8
10.66 @ 126.51 mph
9.99 here I come !!! |
|
| Back to top |
|
|
thev8kid
Site Admin
Joined: 17 Nov 2006
Posts: 3897
Location: Newbury, Berks
1986 Ford Capri
|
| Posted: Mon Jul 19, 2010 10:00 pm Post subject: |
|
|
Pel where do you get your fittings from for the braided hose?
as torquesUK in the discount section offers members discount for there range of fittings and hoses etc.
trying to save you some reddies mate,
i get all mine from Alex, if he aint got it he tries to track it down from the supplier for you.
_________________
Regards Tony C (COOPS)
Sponsored by: www.caprisport.com & www.interpart.biz
Web site: http://www.capriracing.co.uk |
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
Copyright © www.v8forum.co.uk 2006. All Rights Reserved,
Forum Disclaimer: Any posts in the V8 Forum are posted by individuals acting in their own right and do not necessarily reflect the views of the owner, administrators or moderators.
|
Garage
FAQ
Search
Usergroups
Register
Profile
Log in to check your private messages
Log in
