Bent 2 Rods in my LT1 Stroker.. WHY
03-12-2011, 10:02 PM
#62
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Don't know about you but we don't exactly have shops pooring out circle track engines any more. They closed all of our tracks and even when they where here they would not touch a walk in street engine for a min 6 months or untill the season ended. so if they don't work on them alot how in the hell are you supposed to trust them? Again This is why mines on the stand right now. It came out of shop in North GA that does exactly what you are talking about. I gave him free reign last winter after waiting 6 months to build me a short block with LE2 heads and custom cam. It DOES come down to someone who knows how to build what they are building.
03-12-2011, 10:41 PM
#64
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ok just got back from summit.. i got the Trick Flow TFS-21407200 PushRods, Comp Cams 787-16 Steel Retainers, and Comp Cams 26918-16 Valve Springs.. This is the Valve Springs Comp Recomended for the Cam so hopefully they will work and the mfd. Date on the tags says 01/10/11 so there new and hopefully not Mexican Springs.. Im kinda pissed at the shop because they tested the stock springs for lift and said it'd be fine and must not have looked at the duration.. There a pretty descent shop they sponsor the dragstrip and have a **** ton of cars running crazy numbers.. maybe it was a honest mistake IDK but i believe he's going to put everything on at no charge.. have to put off my dyno now because im low on funds that was about a 420 dollar trip so0o0o im hopeing for the best!
03-12-2011, 10:42 PM
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Don't know about you but we don't exactly have shops pooring out circle track engines any more. They closed all of our tracks and even when they where here they would not touch a walk in street engine for a min 6 months or untill the season ended. so if they don't work on them alot how in the hell are you supposed to trust them? Again This is why mines on the stand right now. It came out of shop in North GA that does exactly what you are talking about. I gave him free reign last winter after waiting 6 months to build me a short block with LE2 heads and custom cam. It DOES come down to someone who knows how to build what they are building.
03-12-2011, 11:14 PM
#67
ok just got back from summit.. i got the Trick Flow TFS-21407200 PushRods, Comp Cams 787-16 Steel Retainers, and Comp Cams 26918-16 Valve Springs.. This is the Valve Springs Comp Recomended for the Cam so hopefully they will work and the mfd. Date on the tags says 01/10/11 so there new and hopefully not Mexican Springs.. Im kinda pissed at the shop because they tested the stock springs for lift and said it'd be fine and must not have looked at the duration.. There a pretty descent shop they sponsor the dragstrip and have a **** ton of cars running crazy numbers.. maybe it was a honest mistake IDK but i believe he's going to put everything on at no charge.. have to put off my dyno now because im low on funds that was about a 420 dollar trip so0o0o im hopeing for the best!
03-12-2011, 11:28 PM
#68
The size of the cam has very little to do with the spring requirements, in fact the larger the duration of the cam it could actually be EASIER on valve springs. Give me a .900 base circle and i'll bet i could have valves floating all over the place at <220 duration and less than .370 lobe.
03-13-2011, 12:18 AM
#71
The size of the cam has very little to do with the spring requirements, in fact the larger the duration of the cam it could actually be EASIER on valve springs. Give me a .900 base circle and i'll bet i could have valves floating all over the place at <220 duration and less than .370 lobe.
03-13-2011, 01:02 AM
#73
I guess I can see the logic to that statement, particularly on a cam that has symmetrical type lobes. A bigger duration would mean a nice long, smooth open and close. But these XFI lobes have pretty steep ramps - don't they hit max lift quicker and come down much faster?
I know if I could have fit the 292 in my engine I'd probably be spinning her to 7000 RPM ALL the time and likely wanting even more. Right now my PCM is set to shift at 6500 and if I shift her manually the rev limiters go to 7k. With the 292, even if theoretically the longer duration could make things easier on the springs, the likelihood of wanting to spin the mill even faster is what would hold the door open to valve float.
So the longer duration being easier on valve springs may be true in theory; In practice though...
I know if I could have fit the 292 in my engine I'd probably be spinning her to 7000 RPM ALL the time and likely wanting even more. Right now my PCM is set to shift at 6500 and if I shift her manually the rev limiters go to 7k. With the 292, even if theoretically the longer duration could make things easier on the springs, the likelihood of wanting to spin the mill even faster is what would hold the door open to valve float.
So the longer duration being easier on valve springs may be true in theory; In practice though...
03-13-2011, 09:03 AM
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Don't know about you but we don't exactly have shops pooring out circle track engines any more. They closed all of our tracks and even when they where here they would not touch a walk in street engine for a min 6 months or untill the season ended. so if they don't work on them alot how in the hell are you supposed to trust them? Again This is why mines on the stand right now. It came out of shop in North GA that does exactly what you are talking about. I gave him free reign last winter after waiting 6 months to build me a short block with LE2 heads and custom cam. It DOES come down to someone who knows how to build what they are building.
Well not sure if you know this or not but Nelson Bothers, NBS and a few othere shops around here can build you any kind of enigne you have the money for. We dont have circle tracks NO but we do have a drag strip SUNSHINE SPEED WAY and if you go there and talk to the right people you could find even more great shops in the area that know what there doing. In any performance engine out there 1st,2nd 3rd gen SBC if you upgrade one thing your going to need to upgrade something else. anyone who has ever modded an engine knows this, if you do it cheap then you get cheap results and blown up motors if you do reserch and take your time and ask the right ???? then you can make the dission on if the shop has the ability to do the work. If you go to a shop and say i want this cam or those heads and they dont tell you that you should get better pushrods, or your going to need matching springs then your at the wrong shop. When you buy a camshaft the cam card has the recommended parts to be used with that camshaft, it also says that if those parts or parts equal to those are not used then the warrantee is void. The first problem this guy did is poor reserch on the cam and the shop. the cam he has is too big for stock heads to begin with. and reusing stock valve train parts in a performance apllication is just asking for problems.
03-13-2011, 09:29 AM
#76
I'm really surprised you are running the XFI292 and getting away with their 918 bee hive springs. Well, I mean "bad batches" aside (this is the first I've ever heard about that) I'm sure you are making power and everything, but have you ever dyno'd your car? Did you see any indications of valve float?
When I was getting ready to drop in the smaller XFI280 in my 383 I was told by just about everyone I spoke to (notably LE and AFR) that CC's recommended bee hive spring were far too weak to effectively control the valve train with this XFI lobes. Otherwise the 918 springs would have been on my CC order along with the new lifters, pushrods, and rockers I called in. Heck I even dropped in AFR's rev kit just to be safe.
The springs I went with ended up measuring close to 160lbs closed and almost 420lbs open pressure installed, even though on paper I think their specs were supposed to be well under 150/400. So I know depending on how you install the springs you can end up measuring slightly different pressures. But I guess therein lies the key: MEASURING.
I can't even begin to comment on the OP's situation... its almost unbelievable... running com's biggest XFI cam with STOCK springs???
When I was getting ready to drop in the smaller XFI280 in my 383 I was told by just about everyone I spoke to (notably LE and AFR) that CC's recommended bee hive spring were far too weak to effectively control the valve train with this XFI lobes. Otherwise the 918 springs would have been on my CC order along with the new lifters, pushrods, and rockers I called in. Heck I even dropped in AFR's rev kit just to be safe.
The springs I went with ended up measuring close to 160lbs closed and almost 420lbs open pressure installed, even though on paper I think their specs were supposed to be well under 150/400. So I know depending on how you install the springs you can end up measuring slightly different pressures. But I guess therein lies the key: MEASURING.
I can't even begin to comment on the OP's situation... its almost unbelievable... running com's biggest XFI cam with STOCK springs???
03-13-2011, 02:17 PM
#78
Well not sure if you know this or not but Nelson Bothers, NBS and a few othere shops around here can build you any kind of enigne you have the money for. We dont have circle tracks NO but we do have a drag strip SUNSHINE SPEED WAY and if you go there and talk to the right people you could find even more great shops in the area that know what there doing. In any performance engine out there 1st,2nd 3rd gen SBC if you upgrade one thing your going to need to upgrade something else. anyone who has ever modded an engine knows this, if you do it cheap then you get cheap results and blown up motors if you do reserch and take your time and ask the right ???? then you can make the dission on if the shop has the ability to do the work. If you go to a shop and say i want this cam or those heads and they dont tell you that you should get better pushrods, or your going to need matching springs then your at the wrong shop. When you buy a camshaft the cam card has the recommended parts to be used with that camshaft, it also says that if those parts or parts equal to those are not used then the warrantee is void. The first problem this guy did is poor reserch on the cam and the shop. the cam he has is too big for stock heads to begin with. and reusing stock valve train parts in a performance apllication is just asking for problems.
03-13-2011, 04:30 PM
#79
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Well i mentioned 2 places that can do what ever you may need, But i have a few more for you. FordSpeed on 66th street can build or do what ever you may need. I would not mention any place unless i have been there more than once and they did what the SAID they were going to. NBS does full restores to full drag cars. Fordspeed same. As for nelson brothers They build sick *** motors any size any combo and they even go to the track to dial you in. Im sorry you have had problems in the past, so have i and im an ASE cetified tech and have gone to shops others said were great just to loose out on thousands of hard earned money.. I dont have a dyno either, or the big machines so i either use my works or find a shop that will allow me to or watch them like a hawk. Engine lab in tampa can build you an stock replacement engine but nothing hi po, V&M cylinder head can build and set up your head and he even flow's before and after he touches them.
And who ever posted they should mark the cam card stating stock springs will not work. Well as i stated before the cam card states recommended parts NEEDED for proper installation and the warrantee is void if not. I woukld think that states the stock parts wont work. but thats just me
And who ever posted they should mark the cam card stating stock springs will not work. Well as i stated before the cam card states recommended parts NEEDED for proper installation and the warrantee is void if not. I woukld think that states the stock parts wont work. but thats just me
03-13-2011, 04:46 PM
#80
Well i mentioned 2 places that can do what ever you may need, But i have a few more for you. FordSpeed on 66th street can build or do what ever you may need. I would not mention any place unless i have been there more than once and they did what the SAID they were going to. NBS does full restores to full drag cars. Fordspeed same. As for nelson brothers They build sick *** motors any size any combo and they even go to the track to dial you in. Im sorry you have had problems in the past, so have i and im an ASE cetified tech and have gone to shops others said were great just to loose out on thousands of hard earned money.. I dont have a dyno either, or the big machines so i either use my works or find a shop that will allow me to or watch them like a hawk. Engine lab in tampa can build you an stock replacement engine but nothing hi po, V&M cylinder head can build and set up your head and he even flow's before and after he touches them.
And who ever posted they should mark the cam card stating stock springs will not work. Well as i stated before the cam card states recommended parts NEEDED for proper installation and the warrantee is void if not. I woukld think that states the stock parts wont work. but thats just me
And who ever posted they should mark the cam card stating stock springs will not work. Well as i stated before the cam card states recommended parts NEEDED for proper installation and the warrantee is void if not. I woukld think that states the stock parts wont work. but thats just me
sorry for the thread hijack but where are you located? happen to have the turbo setup finished on your car as I would like to check it out some time if possible.