90mm Cable TB on an LS7 Manifold... Anyone Accomplished This?
01-06-2006, 06:45 PM
#21
Originally Posted by J-Rod
Got an update.
The info is this...
On the dyno at part throttle operation airflow is disrupted when the throttle is opened up with a conventional cable operate throttle. The resulting disruption causes and I quote "a major loss of torque". How major that is, I don't yet know. I'm going to have to get on the phone and see what hard numbers the folks have on it. It should also be noted that at WOT there is no disruption to airflow, and no loss of power.
The info is this...
On the dyno at part throttle operation airflow is disrupted when the throttle is opened up with a conventional cable operate throttle. The resulting disruption causes and I quote "a major loss of torque". How major that is, I don't yet know. I'm going to have to get on the phone and see what hard numbers the folks have on it. It should also be noted that at WOT there is no disruption to airflow, and no loss of power.
01-06-2006, 08:21 PM
#22
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Originally Posted by Ferocity02
The only problem I see is the split second that the throttle blade opens there might be a disruption of flow, this could cause weaker throttle response and a weaker "in the back of your seat" feeling when punching it.
Ramairws6 ....is that TB for sale again or what?
01-06-2006, 10:43 PM
#23
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Originally Posted by Ferocity02
Not to sound ignorant, but doesnt "power" only matter at WOT? I cant think of a situtation when you want lots power at part throttle, seeing that the power itsn't going to be very much at part throttle anyways, if that makes sense. The only problem I see is the split second that the throttle blade opens there might be a disruption of flow, this could cause weaker throttle response and a weaker "in the back of your seat" feeling when punching it.
I wonder if the NW tb's open from the top or bottom...does anyone know? May have to get an LS2 tb and sell the NW.
01-07-2006, 01:52 PM
#26
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Well, on the NW version, no I do not believe so.
http://www.thunderracing.com/catalog...s649_large.jpg
As you can see, the TB is not symetrical. The top has a large rectangular piece, that also has a mounting hole in case you only wanted to mount it with 3 bolts, vs 4.
http://www.thunderracing.com/catalog...s649_large.jpg
As you can see, the TB is not symetrical. The top has a large rectangular piece, that also has a mounting hole in case you only wanted to mount it with 3 bolts, vs 4.
01-07-2006, 01:56 PM
#27
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It is kinda odd to look at, but it will just bolt on upside down with no problem. When it is bolted on the throttle won't work, lever hits the intake. A simple spacer should cure this.
Kurt
Kurt
Originally Posted by Greg Fell
Well, on the NW version, no I do not believe so.
http://www.thunderracing.com/catalog...s649_large.jpg
As you can see, the TB is not symetrical. The top has a large rectangular piece, that also has a mounting hole in case you only wanted to mount it with 3 bolts, vs 4.
http://www.thunderracing.com/catalog...s649_large.jpg
As you can see, the TB is not symetrical. The top has a large rectangular piece, that also has a mounting hole in case you only wanted to mount it with 3 bolts, vs 4.
01-07-2006, 03:09 PM
#29
Originally Posted by Dayzed TA
So will the part throttle loss still be a problem with the spacer? Or will the spacer cure this problem?
A pretty easy fix really. You guys should hang out on the swap/conversion boards, we're all kinds of sneaky.
01-07-2006, 09:19 PM
#30
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Originally Posted by 427
It is kinda odd to look at, but it will just bolt on upside down with no problem. When it is bolted on the throttle won't work, lever hits the intake. A simple spacer should cure this.
Kurt
Kurt
Thanks, sorry for off topic.
01-08-2006, 09:55 AM
#33
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I think everything will work out. I can probably test fit the fly by wire tb also.
Kurt
Kurt
Originally Posted by Greg Fell
Kurt, so a DBW NW TB will work, upside down? Probably have to rewire it (extend)?
Thanks, sorry for off topic.
Thanks, sorry for off topic.
01-08-2006, 12:25 PM
#35
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Ah yes...well simple physics apply here. 
2.20 stainless valves are huge and heavy. Big springs will be needed to adequately control them, imo anyway. Big springs + hydraulic lifters dont mix well.
2.20 stainless valves are huge and heavy. Big springs will be needed to adequately control them, imo anyway. Big springs + hydraulic lifters dont mix well.
01-08-2006, 12:50 PM
#36
I have heard that steel valves will only allow the motor to rev to about 5,500-6000 rpm max which is no good. So another option other then Titanium is needed. I have heard about 2 other options.
1. the valves that come in the L92 which is not out yet and won't be for awhile.
2. Possibly Nascar valves. not sure if these will work or not.
1. the valves that come in the L92 which is not out yet and won't be for awhile.
2. Possibly Nascar valves. not sure if these will work or not.
01-19-2006, 08:02 PM
#37
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You may want to consider this throttle body for your next project!!!
Has the same progression of the LS2/7 for superior driveability.
http://www.umiracing.com/gallery/Ima...2090mm%202.JPG
http://www.umiracing.com/news/Umithrottlebody.html
Same throttle body that was on this engine. https://ls1tech.com/forums/generation-iv-internal-engine/434102-katech-built-ls7-makes-655hp-579ft-lbs-na.html
Has the same progression of the LS2/7 for superior driveability.
http://www.umiracing.com/gallery/Ima...2090mm%202.JPG
http://www.umiracing.com/news/Umithrottlebody.html
Same throttle body that was on this engine. https://ls1tech.com/forums/generation-iv-internal-engine/434102-katech-built-ls7-makes-655hp-579ft-lbs-na.html
01-20-2006, 01:16 AM
#38
Originally Posted by UMIRacing
You may want to consider this throttle body for your next project!!!
Has the same progression of the LS2/7 for superior driveability.
http://www.umiracing.com/gallery/Ima...2090mm%202.JPG
http://www.umiracing.com/news/Umithrottlebody.html
Same throttle body that was on this engine. https://ls1tech.com/forums/showthread.php?t=434102
Has the same progression of the LS2/7 for superior driveability.
http://www.umiracing.com/gallery/Ima...2090mm%202.JPG
http://www.umiracing.com/news/Umithrottlebody.html
Same throttle body that was on this engine. https://ls1tech.com/forums/showthread.php?t=434102
01-20-2006, 07:40 AM
#39
Originally Posted by Ferocity02
Is this a 90mm TB that will bolt directly on the LS7 manifold?
