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Started my nitrous install...
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GrandSportC3
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Location: Lakeland, FL
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1968 Chevrolet Corvette

PostPosted: Mon Jan 01, 2007 8:15 pm    Post subject: Started my nitrous install... Reply with quote

Started my nitrous install on my race '68...

I started with the solenoids and test-fitted the bottle to check out possible bottle locations..

I think that the location of the passenger seat is the best location for the bottle as I can easily access it. I already have the vent tube that I'll install too. (required by NHRA/IHRA). I didn't bolt down the bottle hold down brackets yet because I wanted to check if that bottle location is ok?

Installed the solenoids and the fuel line from the regulator to the fuel solenoid. Tested it and no leaks so far. I haven't installed the plate yet as I don't have long enough studs (I'm using a 1 inch HVH spacer and the plate is about 1/2 inch, so I need studs for 1.5 inch spacing..
Routed the nitrous line to the inside but haven't attached it to the bottle. Any comments or suggestions are appreciated..





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GrandSportC3
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1968 Chevrolet Corvette

PostPosted: Tue Jan 02, 2007 9:32 pm    Post subject: Reply with quote

Here's what I did today.. I got the longer carb studs, installed the plate and hooked everything up. I bolted down the bottle brackets, installed the pressure gauge and the blow off valve.
Then I installed the blow off tube and routed the nitrous line under the carpet to the bottle. I also installed the relais and fuse on the firewall.
Still have to connect and route all the wires.. That should be another 30 minutes of work.

Tomorrow, I'm trying to get a fuel pressure safety switch (that the system shuts off if the fuel pressure drops below 5 psi) and will hook up the electrical system. Will also try to get some brackets to route all the wires nicely.

Here are the pics of the current status:















Last edited by GrandSportC3 on Wed Jan 03, 2007 12:47 pm; edited 1 time in total
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Brutisgearhead
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Joined: 14 Sep 2005
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Location: Greeley colorado
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1974 Chevrolet Monza

PostPosted: Tue Jan 02, 2007 9:52 pm    Post subject: Reply with quote

looking good. How big of a nitrous set up did you buy? keep us up to speed on your results. Thinking of spraing myself this comming season.
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GrandSportC3
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Posts: 1231
Location: Lakeland, FL
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1968 Chevrolet Corvette

PostPosted: Tue Jan 02, 2007 10:21 pm    Post subject: Reply with quote

chad McEwan wrote:
looking good. How big of a nitrous set up did you buy? keep us up to speed on your results. Thinking of spraing myself this comming season.


The kit is adjustable from 100 - 250 HP..
I will only spray a 100 shot in high gear. The goal is to hit 9's..
The block is a 4-bolt 400 block (standard) and the tranny is only built to 800 HP and I already have 650 HP on engine.. Don't want to break engine or tranny, so I'll stay with a conservative tune in high gear until my new setup will go in.. I'll run my current setup until engine and tranny break..
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Brutisgearhead
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1974 Chevrolet Monza

PostPosted: Tue Jan 02, 2007 10:35 pm    Post subject: Reply with quote

Sounds like a good plan, we have a simular engine set up, My goal is to run mid 10's at bandimere speedway in denver co, Da's in the 8000ft. Changing form the old double hump heads to R.H.S allumin, and going roller. also changing form the team G and using a super victor. I'v already swithced to slicks and tring to learn everything I can about tuning a 4 link.


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GrandSportC3
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1968 Chevrolet Corvette

PostPosted: Tue Jan 02, 2007 10:59 pm    Post subject: Reply with quote

chad McEwan wrote:
Sounds like a good plan, we have a simular engine set up, My goal is to run mid 10's at bandimere speedway in denver co, Da's in the 8000ft. Changing form the old double hump heads to R.H.S allumin, and going roller. also changing form the team G and using a super victor. I'v already swithced to slicks and tring to learn everything I can about tuning a 4 link.

Is it a 406 too?

Here are the specs on my engine:

400 block (standard 4-bolt), .030 over
3.75 inch stroke
solid roller cam, 264/270 .050 duration and .672 lift (.630 + 1.6 ratio rocker arms)
Eagle rods, forged pistons, Eagle forged crank
12.8:1 compression
Dart Pro 1 heads, 230 cc intake runners (ported to flow a lot more)
Best ET so far was 10.35 on engine..
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10sec.et
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1969 Oldsmobile Cutlass

PostPosted: Tue Jan 02, 2007 11:13 pm    Post subject: Reply with quote

98ram360 posted this on a nitrous thread i started a while back...http://www.dynotunenitrous.com/store/scripts/prodView.asp?idproduct=67. i like it better than a fuel pressure switch, although a bit more involved to install.
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GrandSportC3
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1968 Chevrolet Corvette

PostPosted: Tue Jan 02, 2007 11:25 pm    Post subject: Reply with quote

10sec.et wrote:
98ram360 posted this on a nitrous thread i started a while back...http://www.dynotunenitrous.com/store/scripts/prodView.asp?idproduct=67. i like it better than a fuel pressure switch, although a bit more involved to install.

It sure is nicer but also costs 5 times as much..
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Brutisgearhead
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1974 Chevrolet Monza

PostPosted: Tue Jan 02, 2007 11:30 pm    Post subject: Reply with quote

It's a 406,400 production block "509" casting #
Eagle competition 4340 rotating assembly
Eagle 4 bolt splayed main caps.
13-1 compression,
Getting ready to install the R.H.S allumin heads 235cc intake runner
2.08 intake 1.60 exaust
The cam is a solid roller custom grind from comp cams, not sure of the size.My brother who is a partner at a local machine shop set up everything and had it ordered.

car- 1974 chevy vega, 5.13 500 stall tubbed, 4 link. 32.14.5.15 hoosier slicks. weight 2465 with 1/4 tank of gas. old set up ran fastes 11.54 @ 115. on hoosier quick time dot's. Hope this new set up will put me in the 10's, if not i'll spray it till it blows or i run the #'s
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Brutisgearhead
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1974 Chevrolet Monza

PostPosted: Tue Jan 02, 2007 11:32 pm    Post subject: Reply with quote

misprint,Thats a 5000 stall,
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GrandSportC3
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Location: Lakeland, FL
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1968 Chevrolet Corvette

PostPosted: Tue Jan 02, 2007 11:59 pm    Post subject: Reply with quote

chad McEwan wrote:
misprint,Thats a 5000 stall,

That's what I thought!! Indeed...very similar build.. I wish that I had splayed caps.. I could run a bigger shot with those..
Your car is very light.. You should be deep in the 10's, even in a high DA... maybe even 9's!
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pro60chevy
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PostPosted: Wed Jan 03, 2007 5:08 am    Post subject: Reply with quote

Grandsport, I didn't see the purge solenoid, make sure to mount it as close to the nitrous solenoid as you can for best results. I'm not a big fan of fuel pressure switches, but it's good insurance just the same. Everything looks great!! You're gonna love it.
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William Jones
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1971 Ford Mustang

PostPosted: Wed Jan 03, 2007 6:14 am    Post subject: Reply with quote

Hey grandsport it looks like you are using the same fuel pressure regulator to run your motor and your nos. That isn't a very good idea. You use fuel pressure to tune the NOS system and some times your fuel pressure for the NOS setup will be around 4 psi or lower. I know you dont run your motor fuel pressure that low I would look at getting another regulator and just putting a T or a Y before your other regulator. That would be the best way to go this will also allow you to tune your nitrous set up. Later Bam
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pro60chevy
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PostPosted: Wed Jan 03, 2007 6:36 am    Post subject: Reply with quote

Wow, I totally missed that one, very good point. I don't agree with the pressure spread that Bill mentioned, unless you are running over 10lbs to your carburetor. 6 3/4 to 7lbs on the nitrous side should be a very safe starting point.
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GrandSportC3
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1968 Chevrolet Corvette

PostPosted: Wed Jan 03, 2007 7:15 am    Post subject: Reply with quote

pro60chevy wrote:
Grandsport, I didn't see the purge solenoid, make sure to mount it as close to the nitrous solenoid as you can for best results. I'm not a big fan of fuel pressure switches, but it's good insurance just the same. Everything looks great!! You're gonna love it.

I'm not using a purge as I'll only spray in high gear.. I know that it will affect consistency, but I'm not using the spray when running brackets.. I also won't use a bottle heater for now.. Maybe I'll add both at one point but for now, I'll just use the basic setup.
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