Srt brake swap on a hemi - Hemi Truck Club
 
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Old 04-15-2014, 07:26 AM   #1
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Srt brake swap on a hemi

Currently doing a 2005 brake swap, wanted to share some pics and have a question at the end :-).

Bought the spindles and calipers for 700$ and spent another 275 for new discs and pads (low quality for now, will by better ones when budget allows :-) )



Calipers needed some tlc, the one pictured I rebuilt with new parts, the other one I took apart, cleaned, greased and reassembled.



While I had the spindle off I also installed new bushings and repainted the frame.



Painted and energy suspension stuff installed.



Couldn't get the rotors off, found this trick on youtube and worked perfectly. Very little force needed to pop the rotors loose.



Stock 20's.



Also installed hydroboost some time back, so this with the srt calipers so give me some massive stopping power I hope. Don't mind the filthy messy engine bay, it's a work in progress :-)



So on to the questions,

- I have read somewhere that the rear calipers on an srt are identical to the stock front dual piston hemi calipers, any truth to this?

- When running stock hemi rear single piston calipers, is a proportioning valve needed to balance for the bigger front calipers?

- On the caliper where the brake line enters the caliper there is a little lip cast into the caliper, due to this the stock hemi brake line doesn't fit, if I however grinded off the lip I could use the stock hemi brake line. My question is does this lip serve any purpose other that ease of install for the brake line and can I safely grind it off?




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Old 04-15-2014, 07:56 AM   #2
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Good work... I like the HydraBoost... The problem I have with the SRT brakes is they restrict the rim size to 20> inch with stock height suspension. Well done, that's a good trick for pushing the disc off.
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Old 04-15-2014, 08:45 AM   #3
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Basterd, you've been a very busy man lol Are you sure you aren't from Florida?
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Old 04-15-2014, 10:17 AM   #4
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Basterd, you've been a very busy man lol Are you sure you aren't from Florida?
Pretty sure you're a couple of thousand miles off :-)
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Old 04-15-2014, 12:50 PM   #5
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That lip helps keep the line still Incase of a bump to it so it doesn't loosen up. By all means you could grid the lip off or get srt front lines for the truck. Either way will work.

As for the rear calipers I don't know.
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Old 04-15-2014, 03:00 PM   #6
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Quote:
Originally Posted by Belgiquebasterd View Post
Pretty sure you're a couple of thousand miles off :-)
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...and to HTC
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Old 04-15-2014, 03:29 PM   #7
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Nice work. And a good tip on the rotor removal.
Question though, what is hydroboost?
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Old 04-15-2014, 04:16 PM   #8
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Nice work. And a good tip on the rotor removal.
Question though, what is hydroboost?
curious minds wanna know
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Old 04-15-2014, 04:28 PM   #9
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When you press the pedal with your foot the force gets 'boosted'. On a stock hemi it gets boosted by the vacuumbooster, wich uses the motorvacuum and a large diapraghm to boost the braking force. The diapraghm is inside the big round thing on the firewall on the driver side.

Hydroboost get it's power from the power steering pump and hydraulically boosts the braking power. Hydro boost is more powerfull than vacuum boost. The unit comes from the diesel rams and is practically bolt in.

When I upgraded my brakes a year ago I did some 'testing' with my iphone G meter.

Stock worn rotors, worn pads & old brake fluid I could achieve 0.76g of braking force.

Slotted EBC rotors, yellow EBC pads & fresh brake fluid but still with the stock vacuum brake booster I could achieve 0.8g of braking force. (very dissapointing for the amount of money EBC stuff costs)

Changed the vacuumbooster to the hydroboost and could achieve 1.05g of braking power!

Left hydroboost, right vacuumbooster. Hydroboost unit is alot smaller than the vacuum one so changing plugs is also easier :-)

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Old 04-15-2014, 04:32 PM   #10
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Christoff, excellent explanation. kudo's
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