My 1st build!!!!!!
#1
Intermediate
Thread Starter
My 1st build!!!!!!
Hello fellow enthusiasts!
I just wanted to share the progress I've made so far on my 91 Vette top end rebuild. I've been having a blast working on this car but also definitely challenging at times! My goal is to have it up and running by the New Year Here is a list of the mods I've done and are currently doing ;
-Competition Cam Kit #K08-467-8
-XFI280XFI HR13 Hydraulic Roller Camshaft (Lift: .576"/.570" With 1.6 Rockers)
-Comp Cam lifter kit and pushrods
-Hooker Long tube headers
-K&N Filter
-Chrome valve covers
-NGK G Power Platinum spark plugs w/ Accel wires
- TCI Torque converter 242800
More info to come soon with pics!! Thanks for all the good advice! This is a great forum
-Joe
I just wanted to share the progress I've made so far on my 91 Vette top end rebuild. I've been having a blast working on this car but also definitely challenging at times! My goal is to have it up and running by the New Year Here is a list of the mods I've done and are currently doing ;
-Competition Cam Kit #K08-467-8
-XFI280XFI HR13 Hydraulic Roller Camshaft (Lift: .576"/.570" With 1.6 Rockers)
-Comp Cam lifter kit and pushrods
-Hooker Long tube headers
-K&N Filter
-Chrome valve covers
-NGK G Power Platinum spark plugs w/ Accel wires
- TCI Torque converter 242800
More info to come soon with pics!! Thanks for all the good advice! This is a great forum
-Joe
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JPL3 C5 (12-11-2017)
#4
Melting Slicks
Member Since: Sep 2008
Location: Cherokee National Forest TN
Posts: 2,376
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Did you change cylinder heads or modify the guides on the stock heads? Stock 113 heads have a guide to retainer interference issue @ +.500 valve opening.
Suggest a valve spring change + check for coil bind.
Luck with your build.
Suggest a valve spring change + check for coil bind.
Luck with your build.
#5
Intermediate
Thread Starter
Do you think I'll be okay with this spring set up? Thanks so much for the heads up! Also here are some pics, please let me know what you think
#6
Melting Slicks
Member Since: Sep 2008
Location: Cherokee National Forest TN
Posts: 2,376
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Received 102 Likes
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Valve springs may be ok check clearance between spring coils with a feeler gauge on both intake & exhaust when each valve is fully open. I like .060 minimum clearance.
Aftermarket retainers may clear the stem seals when the valves are full open need to check.
Hard to tell from the pic but the rollers on the rocker arms look to be off center & toward the exhaust valve side of the head. Magic marker an intake & exhaust valve, reassemble, cycle the assembly & check the witness marks on the valve stems.
Have concerns with pic 3 looks like the engine was cycled without the spider plate installed there are lifters installed 90* to the cam centerline = the lifter rollers were scraping the cam lobes instead of rolling over the lobes. Suggest removing the lifters & eyeball the cam lobes they may be damaged. Also check each lifter roller for damage.
Aftermarket retainers may clear the stem seals when the valves are full open need to check.
Hard to tell from the pic but the rollers on the rocker arms look to be off center & toward the exhaust valve side of the head. Magic marker an intake & exhaust valve, reassemble, cycle the assembly & check the witness marks on the valve stems.
Have concerns with pic 3 looks like the engine was cycled without the spider plate installed there are lifters installed 90* to the cam centerline = the lifter rollers were scraping the cam lobes instead of rolling over the lobes. Suggest removing the lifters & eyeball the cam lobes they may be damaged. Also check each lifter roller for damage.
#7
Intermediate
Thread Starter
Valve springs may be ok check clearance between spring coils with a feeler gauge on both intake & exhaust when each valve is fully open. I like .060 minimum clearance.
Aftermarket retainers may clear the stem seals when the valves are full open need to check.
Hard to tell from the pic but the rollers on the rocker arms look to be off center & toward the exhaust valve side of the head. Magic marker an intake & exhaust valve, reassemble, cycle the assembly & check the witness marks on the valve stems.
Have concerns with pic 3 looks like the engine was cycled without the spider plate installed there are lifters installed 90* to the cam centerline = the lifter rollers were scraping the cam lobes instead of rolling over the lobes. Suggest removing the lifters & eyeball the cam lobes they may be damaged. Also check each lifter roller for damage.
Aftermarket retainers may clear the stem seals when the valves are full open need to check.
Hard to tell from the pic but the rollers on the rocker arms look to be off center & toward the exhaust valve side of the head. Magic marker an intake & exhaust valve, reassemble, cycle the assembly & check the witness marks on the valve stems.
Have concerns with pic 3 looks like the engine was cycled without the spider plate installed there are lifters installed 90* to the cam centerline = the lifter rollers were scraping the cam lobes instead of rolling over the lobes. Suggest removing the lifters & eyeball the cam lobes they may be damaged. Also check each lifter roller for damage.
#8
Intermediate
Thread Starter
Just checked the valve clearance and it was at .090
#9
If you want to make good power you will want to look at other intake manifolds. I didn't see any listed in your first post and the tpi is severely rpm limited.
#10
Intermediate
Thread Starter
This was the first thing I thought too. I had a little more clearance but I know most max around .525. Good thing to double check.
If you want to make good power you will want to look at other intake manifolds. I didn't see any listed in your first post and the tpi is severely rpm limited.
If you want to make good power you will want to look at other intake manifolds. I didn't see any listed in your first post and the tpi is severely rpm limited.
I also measured the springs at .090. Is that okay in your opinion? I appreciate it!!
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L98-C4-HI (12-21-2017)
#11
They say you want .090 between your valve seal and spring retainer and .060 before coil bind in the springs. You should check both.
I'm no expert but it looks like you have made good headway with your porting. You should see some gain but your runners are a major restriction. You might be able to find a used set of siameased runners to help your cause but I wouldn't spend much on the tpi setup, it's better spent on mini ram or a super ram. Some of the experienced tpi guys will be able to help more in that area, I chunked my tpi setup first thing.
Notice: this has been debated at length on this forum and this is just my opinion, I'm not looking to start an argument on tpi vs the world. (Some guys will want to take it there)
I'm no expert but it looks like you have made good headway with your porting. You should see some gain but your runners are a major restriction. You might be able to find a used set of siameased runners to help your cause but I wouldn't spend much on the tpi setup, it's better spent on mini ram or a super ram. Some of the experienced tpi guys will be able to help more in that area, I chunked my tpi setup first thing.
Notice: this has been debated at length on this forum and this is just my opinion, I'm not looking to start an argument on tpi vs the world. (Some guys will want to take it there)
#12
Intermediate
Thread Starter
They say you want .090 between your valve seal and spring retainer and .060 before coil bind in the springs. You should check both.
I'm no expert but it looks like you have made good headway with your porting. You should see some gain but your runners are a major restriction. You might be able to find a used set of siameased runners to help your cause but I wouldn't spend much on the tpi setup, it's better spent on mini ram or a super ram. Some of the experienced tpi guys will be able to help more in that area, I chunked my tpi setup first thing.
Notice: this has been debated at length on this forum and this is just my opinion, I'm not looking to start an argument on tpi vs the world. (Some guys will want to take it there)
I'm no expert but it looks like you have made good headway with your porting. You should see some gain but your runners are a major restriction. You might be able to find a used set of siameased runners to help your cause but I wouldn't spend much on the tpi setup, it's better spent on mini ram or a super ram. Some of the experienced tpi guys will be able to help more in that area, I chunked my tpi setup first thing.
Notice: this has been debated at length on this forum and this is just my opinion, I'm not looking to start an argument on tpi vs the world. (Some guys will want to take it there)
I am about to assemble the TPI system back together and prep the manifold to install. Could anyone give me some advice as to what all I can assemble onto the motor before I hook the lift up to it? FYI, I didn't take the hood off. Thanks!!
#13
Race Director
I mounted mine sans runners. I used bolt-holes on the lower intake to lift/install the motor. With the exception of the water pump, I installed accessories once mounted.
With the cam chosen, I also agree that runners (at a minimum) are called for. Even with nicely ported stock runners, it'll be starving for air. I tend to think runners restrict the most due to their semi-circular shape. Larger runners help to mitigate that somewhat.
As for the choice between individual/siamesed runners, I've noted better results with separate runners.
I like the option of a shorter-runner intake [especially] if it's an automatic....though the tuning changes will be somewhat more extensive.
With the cam chosen, I also agree that runners (at a minimum) are called for. Even with nicely ported stock runners, it'll be starving for air. I tend to think runners restrict the most due to their semi-circular shape. Larger runners help to mitigate that somewhat.
As for the choice between individual/siamesed runners, I've noted better results with separate runners.
I like the option of a shorter-runner intake [especially] if it's an automatic....though the tuning changes will be somewhat more extensive.
#15
Intermediate
Thread Starter
Thanks for the input! There is another member that pm'd me about a Mini ram system for sale. Just waiting to here back on the price. You don't think I'll have enough even with the porting I did? The only reason I ask is because I worked pretty hard on it.
#16
Race Director
Aftermarket runners are anywhere from 1.6"(SLP, to 1.65" (Edelbrock, Accel, ASM) to 1.9" (FFI). If you look at flow POTENTIAL for the bigger sizes 1.9" is the best. COMPLETELY ported ASM runners (TPIS) can hit 1.75". I can't find (easily) find flow numbers anymore but I mega ported (and siamesed) SLPs for my 383. IIRC, 250cfm was about the best I could shoot for...maybe 260 with the mild siamesing I also did.
113 heads flow something like 195/160 "out-of-the-box". Your porting looks much more thorough on their "runners". If you did a really good job there, they have a 250/190 potential IIRC. IDEALLY, you want your intake to flow 15% MORE than your heads.
I'm just as much an advocate of longtube setups -- if they can be made to flow enough. And, I think you are AT LEAST 1/4" IF NOT 1/2" too small on your intake runner tubes. With the radiused inlets I'm not sure you outflow what the 113s were BEFORE you ported them. When you factor in the "need" for 15% more, there is absolutely no way those runners are big enough.
Realistically, the lower intake runners are also too small...though narrowing as you approach the head isn't all bad. If you had ported/honed LARGE DIAMETER tubed upper/lower intake, I think you'd be a lot happier with a torque build. If you have an automatic, the miniram is definitely going to suit you better.....provided you don't have "mileage" gears.
Of course we said nothing about your rear gear ratio.
#17
Race Director
If it helps, here is an archive of a website whose numbers I used to refer to ALL THE TIME.
Obviously, it was created/meant to tout the HSR but it's helpful to have numbers for various intakes and setups. I didn't verify all the pages/links still work...but the most useful page (to me) is the one I linked above.
Notice what it say about porting of the stock "TPI" in the first paragraph. Many of us think the TPI Shootout article provides great info as well. Even an extrude-honed "stock" TPI doesn't fare very well compared to large-tube, siamesed, etc...
If you don't know what extrude-honed means, you should....to help you understand the shootout article. Also this one.
Obviously, it was created/meant to tout the HSR but it's helpful to have numbers for various intakes and setups. I didn't verify all the pages/links still work...but the most useful page (to me) is the one I linked above.
Notice what it say about porting of the stock "TPI" in the first paragraph. Many of us think the TPI Shootout article provides great info as well. Even an extrude-honed "stock" TPI doesn't fare very well compared to large-tube, siamesed, etc...
If you don't know what extrude-honed means, you should....to help you understand the shootout article. Also this one.
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JD Shredds (03-08-2018)
#18
Intermediate
Thread Starter
If it helps, here is an archive of a website whose numbers I used to refer to ALL THE TIME.
Obviously, it was created/meant to tout the HSR but it's helpful to have numbers for various intakes and setups. I didn't verify all the pages/links still work...but the most useful page (to me) is the one I linked above.
Notice what it say about porting of the stock "TPI" in the first paragraph. Many of us think the TPI Shootout article provides great info as well. Even an extrude-honed "stock" TPI doesn't fare very well compared to large-tube, siamesed, etc...
If you don't know what extrude-honed means, you should....to help you understand the shootout article. Also this one.
Obviously, it was created/meant to tout the HSR but it's helpful to have numbers for various intakes and setups. I didn't verify all the pages/links still work...but the most useful page (to me) is the one I linked above.
Notice what it say about porting of the stock "TPI" in the first paragraph. Many of us think the TPI Shootout article provides great info as well. Even an extrude-honed "stock" TPI doesn't fare very well compared to large-tube, siamesed, etc...
If you don't know what extrude-honed means, you should....to help you understand the shootout article. Also this one.
#19
Race Director
Didn't really take THAT long either. Just need a couple good wire soft-bristle brushes and a bucket/bottle of degreaser. And, a few rags of course. Some use simple green. I think I used something in a purple jug....more of an industrial degreaser.
#20
Team Owner
I didn't notice if your motor is out, but I had to do the same. I threw down plastic/cardboard/whatever...and went to town. Stood IN THE ENGINE BAY and cleaned everything I could reach. Used a rattle-can to freshen up a few places too. (The plastic is to catch drippings/debris so you don't have to lie in a cesspool during reinstallation.)
Didn't really take THAT long either. Just need a couple good wire soft-bristle brushes and a bucket/bottle of degreaser. And, a few rags of course. Some use simple green. I think I used something in a purple jug....more of an industrial degreaser.
Didn't really take THAT long either. Just need a couple good wire soft-bristle brushes and a bucket/bottle of degreaser. And, a few rags of course. Some use simple green. I think I used something in a purple jug....more of an industrial degreaser.