Pushrod Help

429obraii · October 13th, 2011, 07:07 PM

im putting a motor together and i cant figure out what lenght of pushrod i need to use and i dont know what checker to buy either lol. i have a 306 with a B303 cam and E7 heads with GT40 springs and retainers. with the stock rockers.*for now*im pretty sure the block is a 94 but i couldnt find the vin on it, but thats what i was told. so any help would be great

Thanks

fogged306 · October 13th, 2011, 07:27 PM

The range you want for a pushrod checker is going to be in the low 6" range. The one I have for 302 blocks goes from 5.8 to 6.8. Stock is like 6.25 or 6.272 or something like that so you won't deviate from that much.

osa6637 · October 13th, 2011, 07:52 PM

comp cams sells these jegs summit etc. the last three engines i did all ended up with comp cams 6.300 pushrods, when using your checker make sure you are using the spring your going to use. light springs lie becuase they dont deflect the valve train at all. secondly i would take an old lifter and weld the push rod cup too it so its like a solid. and if your using stock rockers dont expect to have the same lift as the cam card because they are'nt a true 1.6 ratio. you'll probably be .010-.025 short on max lift.

429obraii · October 13th, 2011, 08:12 PM

okay thank you guys so much and yes the springs on there are the ones im using

fogged306 · October 13th, 2011, 08:27 PM

If you're using your normal valve spring just make sure to do what osa6637 mentioned and use solid lifter for checking. Some lifters you can take the retainer off, pull the cup, flip the plunger around and then put the cup and retainer back in and it will be a solid lifter. Some you can't do that with though because of the design.

429obraii · October 19th, 2011, 02:30 PM

im using ford roller lifters so would i still need a solid lifter?

fogged306 · October 19th, 2011, 02:56 PM

I'm fairly certain that the ford ones you can do like I mentioned and flip the plunger. I seem to remember that the Ford racing ones was one that I've flipped before but I can't say that 100% .I haven't done it in a while and I can't remember off the top of my head which ones you can and which ones you can't. Only way to tell is pull it apart. It will be very obvious if you can flip it or not.

429obraii · October 19th, 2011, 05:00 PM

i think ill just go to AZ and buy a cheap solid lifter. would that work

fogged306 · October 19th, 2011, 07:32 PM

Yep, that'll work too. Just make sure it's the same height from cup to tip as your hydraulic.

94bossgt · October 19th, 2011, 08:58 PM

Use one of your old litters there is a thread on hear about how to make a hydro lifter solid for checking pushrod length that's how I did mine it's free and it works

horsepowerjunkie · October 19th, 2011, 09:09 PM

Just take a stock hydro roller lifter and pull the guts out, flip the plunger over & put it back togather. The spring clip is a little tight, but will go back togather. I've been using the same set for years!

429obraii · October 20th, 2011, 08:42 PM

okay thankyou guys for all the help!

October 13th, 2011, 07:07 PM	#1
429obraii Newbie 1984 Cougar GT :] Join Date: Oct 2010 Location: Wichita, KS Posts: 28 iTrader: 0 reviews	Pushrod Help im putting a motor together and i cant figure out what lenght of pushrod i need to use and i dont know what checker to buy either lol. i have a 306 with a B303 cam and E7 heads with GT40 springs and retainers. with the stock rockers.for nowim pretty sure the block is a 94 but i couldnt find the vin on it, but thats what i was told. so any help would be great Thanks

October 13th, 2011, 07:52 PM	#3
osa6637 Regular 2001 gt Join Date: Apr 2009 Location: tacoma washington Posts: 105 iTrader: 0 reviews	comp cams sells these jegs summit etc. the last three engines i did all ended up with comp cams 6.300 pushrods, when using your checker make sure you are using the spring your going to use. light springs lie becuase they dont deflect the valve train at all. secondly i would take an old lifter and weld the push rod cup too it so its like a solid. and if your using stock rockers dont expect to have the same lift as the cam card because they are'nt a true 1.6 ratio. you'll probably be .010-.025 short on max lift. __________________ 01 GT totaled, 97 cobra,95 GTS bracket racing crew member #8

October 19th, 2011, 09:09 PM	#11
horsepowerjunkie Hardcore Enthusiast 1989 Black LX---Turbo Join Date: Jun 2010 Location: just outside Minot, ND Posts: 1,153 iTrader: 0 reviews	Just take a stock hydro roller lifter and pull the guts out, flip the plunger over & put it back togather. The spring clip is a little tight, but will go back togather. I've been using the same set for years! __________________ 89 LX Black, Boss 331, C4,T76BB, FAST EFI 82 Capri RS,89 5.0 HO,Comp XE266,TW 170,T5,etc. 73 Dart Sport 340, 410ci Bracket Brawler 72 Demon 340 4-speed 1 of 1667 01 Ram Quad Cab 03 Grizzley 660

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October 13th, 2011, 07:27 PM	#2
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	The range you want for a pushrod checker is going to be in the low 6" range. The one I have for 302 blocks goes from 5.8 to 6.8. Stock is like 6.25 or 6.272 or something like that so you won't deviate from that much.

October 13th, 2011, 08:12 PM	#4
429obraii Newbie 1984 Cougar GT :] Join Date: Oct 2010 Location: Wichita, KS Posts: 28 iTrader: 0 reviews	okay thank you guys so much and yes the springs on there are the ones im using

October 13th, 2011, 08:27 PM	#5
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	If you're using your normal valve spring just make sure to do what osa6637 mentioned and use solid lifter for checking. Some lifters you can take the retainer off, pull the cup, flip the plunger around and then put the cup and retainer back in and it will be a solid lifter. Some you can't do that with though because of the design.

October 19th, 2011, 02:30 PM	#6
429obraii Newbie 1984 Cougar GT :] Join Date: Oct 2010 Location: Wichita, KS Posts: 28 iTrader: 0 reviews	im using ford roller lifters so would i still need a solid lifter?

October 19th, 2011, 02:56 PM	#7
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	I'm fairly certain that the ford ones you can do like I mentioned and flip the plunger. I seem to remember that the Ford racing ones was one that I've flipped before but I can't say that 100% .I haven't done it in a while and I can't remember off the top of my head which ones you can and which ones you can't. Only way to tell is pull it apart. It will be very obvious if you can flip it or not.

October 19th, 2011, 05:00 PM	#8
429obraii Newbie 1984 Cougar GT :] Join Date: Oct 2010 Location: Wichita, KS Posts: 28 iTrader: 0 reviews	i think ill just go to AZ and buy a cheap solid lifter. would that work

October 19th, 2011, 07:32 PM	#9
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	Yep, that'll work too. Just make sure it's the same height from cup to tip as your hydraulic.

October 19th, 2011, 08:58 PM	#10
94bossgt Regular 94 mustang gt too slow to tell Join Date: Jun 2010 Location: northampton pa Posts: 233 iTrader: 0 reviews	Use one of your old litters there is a thread on hear about how to make a hydro lifter solid for checking pushrod length that's how I did mine it's free and it works

October 20th, 2011, 08:42 PM	#12
429obraii Newbie 1984 Cougar GT :] Join Date: Oct 2010 Location: Wichita, KS Posts: 28 iTrader: 0 reviews	okay thankyou guys for all the help!

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