340 RWHP STROKER ??? thats right ! i am getting ready to pick a cam though , but the short story is ... old cam ( 222/114 )started coming apart , a shaving got stuck in the oil pump bypass , i was in one lane of traffic w/no shoulder for three miles of stop & go ... and 2 months later i got a stroker ! the new cam with same heads is 205/212 .540 " x 116.5 ( lpe gt2 ) I DIDNT PICK IT !!!
Questions :
1) is it just the cam that would cause the 110 missing rwhp ?

2) what else could be a factor ?

3) has anyone heard of this happening out there anywhere ?

4) what cams are in other 383 lunati stroker kits that you know of ??

5) WOULD YOU BE PISSED IF YOUR BUILDER SAID " it will be a lot faster ! " , but you lost 60 rwhp ?
all help is appreciated !! ,, thanx bdawg & please help me get my car right !!!

 

that cam is seriously killing you, get something big, BIG and you will be feeling the power, especially with the good flowing heads you already have and good flowing exhaust. that cam is seriously holding you back. when i finish my motor if i don't gain 200rwhp from where i'm at right now(basicaly stock 5.3) i will be very very dissapointed. my bro has a 97 z28 with a LG motorsports 383 LT1 but has stock heads and cam cuz he couldn't afford anything else at the time so his car is exceptionally slow for now, but once he gets a set of good heads and a HUGE cam we will have that thing flying. bigger motors need more air and that cam you have is simply not letting enough in/out

 

bdawg, I see you still hunting for a cam! I would say do the cam first. It is very small and obvious problem that you have. The heads come on second if not one of the last things that you should change at the moment! First get a nice and good cam in there, somewhere in the range of 232/232 to 236/236. With these cams you should be in the range of 440 rwhp to 460 rwhp (on an A4) depending on how good your heads and exhaust flow!

Do the cam first! As I said and you know it it is the obvious problem that you have! One step at a time!

Good luck!

 

im with you ruff ! , but im still wondering if just the cam could make such a huge difference

i was wondering if anyone anywhere has heard of anything like this ?
i am liking a 232 or 236 on a 112 with a big lift
hey ruff , did you get your new heads on yet ? im still waiting for that dyno !

 

Is there a banana in the tail pipe

 

Well, I am having a slight problem with the heads! All 4 of the freeze plugs are sweating, so, I am putting some chemical to stop the leak. But, if this did not work, I would have to take the motor out to change them all.

Well, crap happens! But it is all good

 

Change the cam in there! do not waste time! just do it! One more thing, did you have lash caps on your valves?

 

I will be assembling my 383 Stroker this week (hopefully if my block is ready) and I will be sliding in my new Comp Cams 236/240 with over .600 lift topped off with a set of Absolute Speed Stage II heads. I am hoping for over 450rwhp in an A4. I am also hoping for an 10.70 slip.

 

i have no idea . whats a lash cap ?

 

thats very helpful , thank you ! j/k good luck ! let us know how you do !
pewter : , did you see lthl wepns dyno run & track run ? he just did a stroker with a cam like you "re talking about , but with less lift , 491 RWT and i think 414 rwhp , the clips are pretty cool !!

 

bdawg, do you have the flow numbers for the heads? That will help in picking the cam...your current version is very small, but I have a hard time believing it alone is your problem. If you don't have flow sheets on the heads, pull them off and have them tested. If the heads flow well, and you match that up with a good cam, the next steps would be to rip apart the bottom end. PM me as to who did your engine work...I'd like to avoid them if possible...my car is slow enough as it is.

 

intake

.2" = 152.6

.3"= 202.3

.4" = 252

.5" = 282

.550 = 258.3

.6 = 290

exhaust .2 = 122.7

.3 = 154.2

.4 = 185.8

.5 = 204

.550 = 212.3

.6 = 217
these are approx. my #"s they are from a guy who had stage 2 agostinos put on last year ( about the same time i did )
FYI frontier racing did the work , and a friend of his from lingenfelter recommended the cam ! , rip apart the bottom end ? god dont say that !

 

metaphorically speaking ( huh ? ) you could say that .

 

I would go with the 232 236 .570 .575 112LSA. Get the 114 if you want a better idle, but I think the 112 will get you more power. The lash caps are something that agostino uses on top of the valve stem and bellow the rocker arm. Sort of a hat on the valves to prevent valve damage. I am not using that garbage anymore. If you pull the heads get a valve job done. Agostino wasn't doing anything with the valves. I picked up 20cfm accross the board with just a valve job. My old flow rates look like yours. Programming is going to be a necessity to get it running correctly. Oh and lunati makes the cam I was refering to. It is much easier on the valve train with that lift, but makes good power. My buddy with an M6 with an iron 370ci made 453 rwhp, and 429 lbft with that cam and all the boltons. I would suggest running a set of 30 lb SVO ford injectors with that set up. Don't want to starve the fuel at high rpms. Hope that helps with the decissions.

 

BDawg, back when I had h/c, my shop had received the wrong cam from the manufacturer, it was a 218/200 .525/.535 112 lsa cam. It made 382 rwhp and 367 rwtq (with 5.3 heads)with that cam. As soon as the shop found out about the cam we swapped it for the cam that was supposed to be in there which was a 227/227 .591/.591 113 lsa cam. We took it to the dyno and made 420 rwhp and 400 rwtq with no other changes other than the cam (also with no custom tuning). So that's 38 rwhp and 33 rwtq I gained from a cam swap on a 346, now imagine the results on a 383 cube motor I would say a 236/238 .59x/.59x 112 lsa would give you the power that you desire, if you're still hurting for HP then I'd do a compression test, then if that didn't solve it I have to say pull the motor and find out what the problem is.

 

Bdawg, your cam is so undersized its not even funny. I wouldn't be surprised if you see 40-50rwhp if you step up do a serious cam. Yes, the cam alone can make that big of a difference.

You should get your heads slapped on a flow bench to see if anything is wrong with them. I think 2.055 valves may be a bit small on a stroker motor. If those flow numbers you posted are correct, you could stand to pick up a lot of power from a set of LS6 heads, or milled 6.0L heads if the ls6 heads are too costly. Places like GTP, TEA, MTI, and others are getting 330 cfm or so out of ls6/6.0L heads on the intake side, and stout exhaust numbers as well.

I'd ditch the heads and cam IMO and I bet you could pick up a minimum of 80rwhp.

 

[/quote]

Bdawg, your cam is so undersized its not even funny. I wouldn't be surprised if you see 40-50rwhp if you step up do a serious cam. Yes, the cam alone can make that big of a difference.

You should get your heads slapped on a flow bench to see if anything is wrong with them. I think 2.055 valves may be a bit small on a stroker motor. If those flow numbers you posted are correct, you could stand to pick up a lot of power from a set of LS6 heads, or milled 6.0L heads if the ls6 heads are too costly. Places like GTP, TEA, MTI, and others are getting 330 cfm or so out of ls6/6.0L heads on the intake side, and stout exhaust numbers as well.

I'd ditch the heads and cam IMO and I bet you could pick up a minimum of 80rwhp.

[/quote]

verbs , where in town would you take your heads ?
the 222/114 i had made probably 60 rwhp more than this stroker. ( i never dynoed it , but sotp was alot stronger! )
ruff ss made his 450 with stage 2 agostinos ( after MTI changed his valves )
i am probably going to change the cam first , i might have the same problem ruff did with the valves , but i guess ill deal with one problem at a time , but while im changing the cam do you think i should go to a high volume oil pump ?

 

thanx stroked , that helps alot . as soon as i make a decision i will post it .

i would love to hear from PSJ or RAUGHAMMER !!!!

 

Bdawg, your cam is so undersized its not even funny. I wouldn't be surprised if you see 40-50rwhp if you step up do a serious cam. Yes, the cam alone can make that big of a difference.

You should get your heads slapped on a flow bench to see if anything is wrong with them. I think 2.055 valves may be a bit small on a stroker motor. If those flow numbers you posted are correct, you could stand to pick up a lot of power from a set of LS6 heads, or milled 6.0L heads if the ls6 heads are too costly. Places like GTP, TEA, MTI, and others are getting 330 cfm or so out of ls6/6.0L heads on the intake side, and stout exhaust numbers as well.

I'd ditch the heads and cam IMO and I bet you could pick up a minimum of 80rwhp.

[/quote]

verbs , where in town would you take your heads ?
the 222/114 i had made probably 60 rwhp more than this stroker. ( i never dynoed it , but sotp was alot stronger! )
ruff ss made his 450 with stage 2 agostinos ( after MTI changed his valves )
i am probably going to change the cam first , i might have the same problem ruff did with the valves , but i guess ill deal with one problem at a time , but while im changing the cam do you think i should go to a high volume oil pump ?


[/quote]

Since your car is a 98 I say why not add a better oil pump for safety. As far as where to take the heads, call 1st Performance. The owner Steve knows some good head porters. Also try Xtreme Motorsports and see what they have to say. The make some of the fastest Vettes in the country so they have to know a few good places in town. Their link is on the website as well. I'm not sure of their numbers off hand but it should be somewhere on AZFBA's website. They have banners you can click on for more info.

 

raughammer ! , PSJ ? ttt