people running victor jr. intake
people running victor jr. intake This might apply to the super victor intake as well. I just got the victor jr. intake that I'm using for a single plain intake in the mail today. I started marking the holes to be redrilled for the lt1 heads and i realized it's going to be impossible to get the bolts in where the lt1 holes will be. Is there some trick to this or do i need to get my head drilled and tapped instead?
how much will that run me?
how much will that run me?
Best thing to do is give these guys a call and see what they can do for you.
Bryan and Pecos at:
www.latemodelengines.com
or Portpros.com
Bryan and Pecos at:
www.latemodelengines.com
or Portpros.com
Hate to bring up an old thread but here is my situation.
We just built a 383 form my dads 65 Chevelle with a set of Lt1 Trickflow heads that were done by TEA. These heads were blanks that they modified and not the lt1 heads you see at summit. They have 2.02 int and 1.60 exh valves and 200 cc runners flowing 293 int and like 258 exh. Great midlift numbers as well.
We have a ported stock intake , Cam is a Cam motion 239/247 (lift was around.580 but dont remember exactly) 110 lsa with 4 deg advance.
We wanted to shift around 6800 but on the dyno at THunder racing the motor was peaking at 5500 rpms. Either cam motion missed there lick on this cam or something else is wrong. Compression in the motor is 11.4/1 and because of the cyl psi that we are seeing Geoff was having to keep pulling timing to get out of knock retard. WE are tuning on pump gas .
We are running 1 3/4 headers, msd opti spark and coil with msd wires. One thing that comes to mind is at the track the car was popping going down the track, it did not do it on the dyno. I changed the plugs and found out that Pops had autolite 3924 plugs ( platinum) and we replaced them with AR 3924's . Would the platunum plug hold this car back? Any ways back to the peaking at 5500, this is why I dug up this old post. Would the vic jr make this cam pull up higher then the factory Intake?
We just built a 383 form my dads 65 Chevelle with a set of Lt1 Trickflow heads that were done by TEA. These heads were blanks that they modified and not the lt1 heads you see at summit. They have 2.02 int and 1.60 exh valves and 200 cc runners flowing 293 int and like 258 exh. Great midlift numbers as well.
We have a ported stock intake , Cam is a Cam motion 239/247 (lift was around.580 but dont remember exactly) 110 lsa with 4 deg advance.
We wanted to shift around 6800 but on the dyno at THunder racing the motor was peaking at 5500 rpms. Either cam motion missed there lick on this cam or something else is wrong. Compression in the motor is 11.4/1 and because of the cyl psi that we are seeing Geoff was having to keep pulling timing to get out of knock retard. WE are tuning on pump gas .
We are running 1 3/4 headers, msd opti spark and coil with msd wires. One thing that comes to mind is at the track the car was popping going down the track, it did not do it on the dyno. I changed the plugs and found out that Pops had autolite 3924 plugs ( platinum) and we replaced them with AR 3924's . Would the platunum plug hold this car back? Any ways back to the peaking at 5500, this is why I dug up this old post. Would the vic jr make this cam pull up higher then the factory Intake?
One other adition I would like to add is the trans is a Art Carr 700r with a manual valve body, 4700 stall unlocked and the car made 375 rwhp unlocked and traps 113 in the heat. I feel that the converter is to loose for this setup where as his old xfi cam(248/258 114 lsa 110cl cam ) needed this much converter to get it moving .
this new set up made 86 more hp on the dyno at 50 mph, 60 more at 90 mph and then fell off at 105 . THis is compared to the last dyno that made 400 rwhp but through a 3200 converter that was way more efficient on the dyno but would not get the old setup out of its own way with that xfi cam. 1.90 60 ft's with 3200 stall, 1.59's with the 4700.
now I think that the tq we are seeing , the converter could go back to the 3800 range.
this new set up made 86 more hp on the dyno at 50 mph, 60 more at 90 mph and then fell off at 105 . THis is compared to the last dyno that made 400 rwhp but through a 3200 converter that was way more efficient on the dyno but would not get the old setup out of its own way with that xfi cam. 1.90 60 ft's with 3200 stall, 1.59's with the 4700.
now I think that the tq we are seeing , the converter could go back to the 3800 range.
Joined: Nov 2001
Posts: 10,023
Likes: 6
From: LT1 land...the "409" of the 90s!
Damn you have some thing choking you. We cut the same cam three years ago for mine and it peaks around 6,900+ with a 12 to 1 380Ci Engine. My heads have simular flow number but are stock and I have a massively modified intake. She makes a modest 425ish N/A with a N2O tune.
How old is the Opti. As with a few other things the early ones seemed to have some problems. I just had to pull my first one out and send it back due to a high RPM miss. We ran 10.97@121 having to shift at 6,200 in first and 6,400 in second. It would seem the faster it spuh up(like in first gear at the track) the worse it got. On the dyno it was fine and pulled 42xrwhp N/A and 64xrwhp on juice.
For grin's try another Opti.
BTW I am running AR race plugs gapped at .030
How old is the Opti. As with a few other things the early ones seemed to have some problems. I just had to pull my first one out and send it back due to a high RPM miss. We ran 10.97@121 having to shift at 6,200 in first and 6,400 in second. It would seem the faster it spuh up(like in first gear at the track) the worse it got. On the dyno it was fine and pulled 42xrwhp N/A and 64xrwhp on juice.
For grin's try another Opti.
BTW I am running AR race plugs gapped at .030
we gapped them to .035.
THe opti is about a year old. The car also has a bad intake piping system. we need to rig up a cold air or even better a ram air setup as it comes off the maf and into a pipe about 8" long and then into a filter. NO cold air at all.
I think once it is not popping up top that it will come around. the car weights 3450 with pops in it and is running high 11s at 113 with open dual cutouts about a foot behind the headers.
THe opti is about a year old. The car also has a bad intake piping system. we need to rig up a cold air or even better a ram air setup as it comes off the maf and into a pipe about 8" long and then into a filter. NO cold air at all.
I think once it is not popping up top that it will come around. the car weights 3450 with pops in it and is running high 11s at 113 with open dual cutouts about a foot behind the headers.
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was the cam degreed? what was the ICL and the IVC?
What was the ICL and IVC on the XFI cam?
Plenty of duration on the cam Motion to peak MUCH higher unless it was just installed WAY advanced.
11.4 SCR should not be giving you problems with detonation with that cam.
One thing to check would be the valve lash. make sure they are adjusted to 1/16 past zero lash (zero lash with Comp R's) as rockers too tight will cause valves to bounce and float sooner than they normally would waith proper adjustment. Worth a shot to try and see.
You can look at the AFG's on the street and see what happens around 5500 RPM and up (should be dropping) and then adjust rockers and see if they keep climbing.
Could be valve float due to spring pressure also. What springs do you have and what seat/open pressure do you have?
Rocker adj. or springs can cause the low RPM for peak HP and detonation as the valves are not staying shut and trapping cylinder pressure.
Lloyd
What was the ICL and IVC on the XFI cam?
Plenty of duration on the cam Motion to peak MUCH higher unless it was just installed WAY advanced.
11.4 SCR should not be giving you problems with detonation with that cam.
One thing to check would be the valve lash. make sure they are adjusted to 1/16 past zero lash (zero lash with Comp R's) as rockers too tight will cause valves to bounce and float sooner than they normally would waith proper adjustment. Worth a shot to try and see.
You can look at the AFG's on the street and see what happens around 5500 RPM and up (should be dropping) and then adjust rockers and see if they keep climbing.
Could be valve float due to spring pressure also. What springs do you have and what seat/open pressure do you have?
Rocker adj. or springs can cause the low RPM for peak HP and detonation as the valves are not staying shut and trapping cylinder pressure.
Lloyd
We can check the valve adjustment. My brother put his motor together so I dont really know how they were adjusted but I do know that in the past my brother has always set valve lash a half a turn past zero lash.
as for degreeing the cam, no it was put in dot to dot this I know because this has already been discussed about redoing.
as for degreeing the cam, no it was put in dot to dot this I know because this has already been discussed about redoing.
adjust rockers firsta nd see what happens. 1/2 past is WAY too tight and can be the problem.
If that is not it, have to tear into it and degree the cam.
Other than that, valve springs will be next on the list.
Lloyd
If that is not it, have to tear into it and degree the cam.
Other than that, valve springs will be next on the list.
Lloyd
the valve springs are from TEA. dual springs with titanium retainers and using ls1 vaves to keep weight down.
I will be home from work tuesday so I might readjust the valves and see what that does . we are going to the track again on Wensday night
I will be home from work tuesday so I might readjust the valves and see what that does . we are going to the track again on Wensday night
